diff --git a/src/Acl/Adapter/AbstractAdapter.php b/src/Acl/Adapter/AbstractAdapter.php
index 4d0cc899..5f40dca5 100644
--- a/src/Acl/Adapter/AbstractAdapter.php
+++ b/src/Acl/Adapter/AbstractAdapter.php
@@ -59,7 +59,7 @@ abstract class AbstractAdapter extends AbstractEventsAware implements \Phalcon\A
      *
      * @return string|null
      */
-    public function getActiveAccess(): ?string
+    public function getActiveAccess(): string|null
     {
     }
 
@@ -68,7 +68,7 @@ public function getActiveAccess(): ?string
      *
      * @return string|null
      */
-    public function getActiveComponent(): ?string
+    public function getActiveComponent(): string|null
     {
     }
 
@@ -78,7 +78,7 @@ public function getActiveComponent(): ?string
      *
      * @return string|null
      */
-    public function getActiveRole(): ?string
+    public function getActiveRole(): string|null
     {
     }
 
diff --git a/src/Acl/Adapter/AdapterInterface.php b/src/Acl/Adapter/AdapterInterface.php
index 3ebef211..851d7d7a 100644
--- a/src/Acl/Adapter/AdapterInterface.php
+++ b/src/Acl/Adapter/AdapterInterface.php
@@ -93,7 +93,7 @@ public function dropComponentAccess(string $componentName, $accessList): void;
      *
      * @return string|null
      */
-    public function getActiveAccess(): ?string;
+    public function getActiveAccess(): string|null;
 
     /**
      * Returns the role which the list is checking if it's allowed to certain
@@ -101,7 +101,7 @@ public function getActiveAccess(): ?string;
      *
      * @return string|null
      */
-    public function getActiveRole(): ?string;
+    public function getActiveRole(): string|null;
 
     /**
      * Returns the component which the list is checking if some role can access
@@ -109,7 +109,7 @@ public function getActiveRole(): ?string;
      *
      * @return string|null
      */
-    public function getActiveComponent(): ?string;
+    public function getActiveComponent(): string|null;
 
     /**
      * Return an array with every component registered in the list
diff --git a/src/Acl/Adapter/Memory.php b/src/Acl/Adapter/Memory.php
index d2fc64f8..ac536ab6 100644
--- a/src/Acl/Adapter/Memory.php
+++ b/src/Acl/Adapter/Memory.php
@@ -329,7 +329,7 @@ public function dropComponentAccess(string $componentName, $accessList): void
      *
      * @return mixed
      */
-    public function getActiveFunction()
+    public function getActiveFunction(): mixed
     {
     }
 
@@ -347,7 +347,7 @@ public function getActiveFunctionCustomArgumentsCount(): int
      *
      * @return string|null
      */
-    public function getActiveKey(): ?string
+    public function getActiveKey(): string|null
     {
     }
 
@@ -466,7 +466,7 @@ private function allowOrDeny(string $roleName, string $componentName, $access, $
      * @param string $access
      * @return string|bool
      */
-    private function canAccess(string $roleName, string $componentName, string $access)
+    private function canAccess(string $roleName, string $componentName, string $access): bool|string
     {
     }
 
diff --git a/src/Annotations/Adapter/Apcu.php b/src/Annotations/Adapter/Apcu.php
index 7cb1d60b..7560a18a 100644
--- a/src/Annotations/Adapter/Apcu.php
+++ b/src/Annotations/Adapter/Apcu.php
@@ -50,7 +50,7 @@ public function __construct(array $options = [])
      * @param string $key
      * @return bool|Reflection
      */
-    public function read(string $key)
+    public function read(string $key): Reflection|bool
     {
     }
 
diff --git a/src/Annotations/Adapter/Memory.php b/src/Annotations/Adapter/Memory.php
index 7e4194ec..3a76055e 100644
--- a/src/Annotations/Adapter/Memory.php
+++ b/src/Annotations/Adapter/Memory.php
@@ -28,7 +28,7 @@ class Memory extends \Phalcon\Annotations\Adapter\AbstractAdapter
      * @param string $key
      * @return bool|Reflection
      */
-    public function read(string $key)
+    public function read(string $key): Reflection|bool
     {
     }
 
diff --git a/src/Annotations/Adapter/Stream.php b/src/Annotations/Adapter/Stream.php
index ead578fb..59f08df5 100644
--- a/src/Annotations/Adapter/Stream.php
+++ b/src/Annotations/Adapter/Stream.php
@@ -50,7 +50,7 @@ public function __construct(array $options = [])
      * @param string $key
      * @return bool|int|Reflection
      */
-    public function read(string $key)
+    public function read(string $key): Reflection|int|bool
     {
     }
 
diff --git a/src/Annotations/Annotation.php b/src/Annotations/Annotation.php
index daa1d03a..56342289 100644
--- a/src/Annotations/Annotation.php
+++ b/src/Annotations/Annotation.php
@@ -50,7 +50,7 @@ public function __construct(array $reflectionData)
      * @param mixed $position
      * @return mixed|null
      */
-    public function getArgument($position)
+    public function getArgument($position): mixed
     {
     }
 
@@ -78,7 +78,7 @@ public function getExprArguments(): array
      * @param array $expr
      * @return mixed
      */
-    public function getExpression(array $expr)
+    public function getExpression(array $expr): mixed
     {
     }
 
@@ -87,7 +87,7 @@ public function getExpression(array $expr)
      *
      * @return string|null
      */
-    public function getName(): ?string
+    public function getName(): string|null
     {
     }
 
@@ -97,7 +97,7 @@ public function getName(): ?string
      * @param string $name
      * @return mixed|null
      */
-    public function getNamedArgument(string $name)
+    public function getNamedArgument(string $name): mixed
     {
     }
 
@@ -107,7 +107,7 @@ public function getNamedArgument(string $name)
      * @param string $name
      * @return mixed
      */
-    public function getNamedParameter(string $name)
+    public function getNamedParameter(string $name): mixed
     {
     }
 
diff --git a/src/Annotations/AnnotationsFactory.php b/src/Annotations/AnnotationsFactory.php
index 94105e4d..27bcfdc5 100644
--- a/src/Annotations/AnnotationsFactory.php
+++ b/src/Annotations/AnnotationsFactory.php
@@ -40,7 +40,7 @@ public function __construct(array $services = [])
      * Factory to create an instance from a Config object
      * @return mixed
      */
-    public function load($config)
+    public function load($config): mixed
     {
     }
 
diff --git a/src/Annotations/Collection.php b/src/Annotations/Collection.php
index 36300ede..db5deef4 100644
--- a/src/Annotations/Collection.php
+++ b/src/Annotations/Collection.php
@@ -64,7 +64,7 @@ public function count(): int
      *
      * @return mixed
      */
-    public function current()
+    public function current(): mixed
     {
     }
 
diff --git a/src/Annotations/Reflection.php b/src/Annotations/Reflection.php
index 38069236..f5679926 100644
--- a/src/Annotations/Reflection.php
+++ b/src/Annotations/Reflection.php
@@ -66,7 +66,7 @@ public function __construct(array $reflectionData = [])
      *
      * @return Collection|null
      */
-    public function getClassAnnotations(): ?Collection
+    public function getClassAnnotations(): Collection|null
     {
     }
 
diff --git a/src/Application/AbstractApplication.php b/src/Application/AbstractApplication.php
index b7a17fd1..0b3061ff 100644
--- a/src/Application/AbstractApplication.php
+++ b/src/Application/AbstractApplication.php
@@ -62,7 +62,7 @@ public function getDefaultModule(): string
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -72,7 +72,7 @@ public function getEventsManager(): ?ManagerInterface
      * @param string $name *
      * @return array|mixed
      */
-    public function getModule(string $name)
+    public function getModule(string $name): object|array
     {
     }
 
diff --git a/src/Assets/Asset.php b/src/Assets/Asset.php
index 01030196..808febad 100644
--- a/src/Assets/Asset.php
+++ b/src/Assets/Asset.php
@@ -194,7 +194,7 @@ public function getType(): string
      *
      * @return string|null
      */
-    public function getVersion(): ?string
+    public function getVersion(): string|null
     {
     }
 
diff --git a/src/Assets/AssetInterface.php b/src/Assets/AssetInterface.php
index d16d8a78..96840289 100644
--- a/src/Assets/AssetInterface.php
+++ b/src/Assets/AssetInterface.php
@@ -26,7 +26,7 @@ public function getAssetKey(): string;
      *
      * @return array|null
      */
-    public function getAttributes(): ?array;
+    public function getAttributes(): array|null;
 
     /**
      * Gets if the asset must be filtered or not.
diff --git a/src/Assets/Manager.php b/src/Assets/Manager.php
index 8dd8923b..1e463562 100644
--- a/src/Assets/Manager.php
+++ b/src/Assets/Manager.php
@@ -272,7 +272,7 @@ public function has(string $name): bool
      * @return string|null
      * @throws Exception
      */
-    public function output(Collection $collection, string $type): ?string
+    public function output(Collection $collection, string $type): string|null
     {
     }
 
diff --git a/src/Autoload/Loader.php b/src/Autoload/Loader.php
index b11e3f0e..24fd0eab 100644
--- a/src/Autoload/Loader.php
+++ b/src/Autoload/Loader.php
@@ -155,7 +155,7 @@ public function autoload(string $className): bool
      *
      * @return string|null
      */
-    public function getCheckedPath(): ?string
+    public function getCheckedPath(): string|null
     {
     }
 
@@ -209,7 +209,7 @@ public function getFiles(): array
      *
      * @return string|null
      */
-    public function getFoundPath(): ?string
+    public function getFoundPath(): string|null
     {
     }
 
diff --git a/src/Cache/AbstractCache.php b/src/Cache/AbstractCache.php
index 9f3253ae..5f073b7b 100644
--- a/src/Cache/AbstractCache.php
+++ b/src/Cache/AbstractCache.php
@@ -68,7 +68,7 @@ public function setEventsManager(\Phalcon\Events\ManagerInterface $eventsManager
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -142,7 +142,7 @@ protected function doDeleteMultiple($keys): bool
      * @throws InvalidArgumentException MUST be thrown if the $key string is
      * not a legal value.
      */
-    protected function doGet(string $key, $defaultValue = null)
+    protected function doGet(string $key, $defaultValue = null): mixed
     {
     }
 
diff --git a/src/Cli/Dispatcher.php b/src/Cli/Dispatcher.php
index c556e575..77eedc2f 100644
--- a/src/Cli/Dispatcher.php
+++ b/src/Cli/Dispatcher.php
@@ -66,7 +66,7 @@ class Dispatcher extends \Phalcon\Dispatcher\AbstractDispatcher implements \Phal
      * @param array $params
      * @return mixed
      */
-    public function callActionMethod($handler, string $actionMethod, array $params = [])
+    public function callActionMethod($handler, string $actionMethod, array $params = []): mixed
     {
     }
 
@@ -96,7 +96,7 @@ public function getLastTask(): TaskInterface
      * @param  mixed $defaultValue
      * @return mixed
      */
-    public function getOption($option, $filters = null, $defaultValue = null)
+    public function getOption($option, $filters = null, $defaultValue = null): mixed
     {
     }
 
diff --git a/src/Cli/Router.php b/src/Cli/Router.php
index 999b515c..1b27cc87 100644
--- a/src/Cli/Router.php
+++ b/src/Cli/Router.php
@@ -135,7 +135,7 @@ public function getActionName(): string
      *
      * @return RouteInterface|null
      */
-    public function getMatchedRoute(): ?RouteInterface
+    public function getMatchedRoute(): RouteInterface|null
     {
     }
 
@@ -182,7 +182,7 @@ public function getParameters(): array
      * @param int $id
      * @return bool|RouteInterface
      */
-    public function getRouteById($id)
+    public function getRouteById($id): RouteInterface|bool
     {
     }
 
@@ -192,7 +192,7 @@ public function getRouteById($id)
      * @param string $name
      * @return bool|RouteInterface
      */
-    public function getRouteByName(string $name)
+    public function getRouteByName(string $name): RouteInterface|bool
     {
     }
 
diff --git a/src/Cli/Router/Route.php b/src/Cli/Router/Route.php
index 20c2ff6f..f6a9a637 100644
--- a/src/Cli/Router/Route.php
+++ b/src/Cli/Router/Route.php
@@ -130,7 +130,7 @@ public static function delimiter(string $delimiter = null): void
      * @param string $pattern
      * @return array|bool
      */
-    public function extractNamedParams(string $pattern)
+    public function extractNamedParams(string $pattern): bool|array
     {
     }
 
@@ -139,7 +139,7 @@ public function extractNamedParams(string $pattern)
      *
      * @return mixed
      */
-    public function getBeforeMatch()
+    public function getBeforeMatch(): mixed
     {
     }
 
diff --git a/src/Cli/RouterInterface.php b/src/Cli/RouterInterface.php
index 2393d25b..66e4bfee 100644
--- a/src/Cli/RouterInterface.php
+++ b/src/Cli/RouterInterface.php
@@ -37,7 +37,7 @@ public function getActionName(): string;
      *
      * @return RouteInterface|null
      */
-    public function getMatchedRoute(): ?RouteInterface;
+    public function getMatchedRoute(): RouteInterface|null;
 
     /**
      * Return the sub expressions in the regular expression matched
diff --git a/src/Cli/Task.php b/src/Cli/Task.php
index 96885d53..7ae41b08 100644
--- a/src/Cli/Task.php
+++ b/src/Cli/Task.php
@@ -56,7 +56,7 @@ final public function __construct()
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
diff --git a/src/Config/Adapter/Ini.php b/src/Config/Adapter/Ini.php
index bed83dd4..219cf4f3 100644
--- a/src/Config/Adapter/Ini.php
+++ b/src/Config/Adapter/Ini.php
@@ -77,7 +77,7 @@ public function __construct(string $filePath, int $mode = 1)
      *
      * @return mixed
      */
-    protected function cast($ini)
+    protected function cast($ini): mixed
     {
     }
 
diff --git a/src/Config/Config.php b/src/Config/Config.php
index e31b4262..1cf7863a 100644
--- a/src/Config/Config.php
+++ b/src/Config/Config.php
@@ -91,7 +91,7 @@ public function merge($toMerge): ConfigInterface
      *
      * @return mixed
      */
-    public function path(string $path, $defaultValue = null, string $delimiter = null)
+    public function path(string $path, $defaultValue = null, string $delimiter = null): mixed
     {
     }
 
diff --git a/src/Config/ConfigInterface.php b/src/Config/ConfigInterface.php
index 9445c4d1..690ec4a3 100644
--- a/src/Config/ConfigInterface.php
+++ b/src/Config/ConfigInterface.php
@@ -37,7 +37,7 @@ public function merge($toMerge): ConfigInterface;
      *
      * @return mixed
      */
-    public function path(string $path, $defaultValue = null, string $delimiter = null);
+    public function path(string $path, $defaultValue = null, string $delimiter = null): mixed;
 
     /**
      * @param string|null $delimiter
diff --git a/src/DataMapper/Pdo/Connection/AbstractConnection.php b/src/DataMapper/Pdo/Connection/AbstractConnection.php
index 2de1d6ce..8bc3addc 100644
--- a/src/DataMapper/Pdo/Connection/AbstractConnection.php
+++ b/src/DataMapper/Pdo/Connection/AbstractConnection.php
@@ -82,7 +82,7 @@ abstract public function disconnect(): void;
      *
      * @return string|null
      */
-    public function errorCode(): ?string
+    public function errorCode(): string|null
     {
     }
 
@@ -195,7 +195,7 @@ public function fetchGroup(string $statement, array $values = [], int $flags = \
      * @return object
      * @param string $className
      */
-    public function fetchObject(string $statement, array $values = [], string $className = 'stdClass', array $arguments = [])
+    public function fetchObject(string $statement, array $values = [], string $className = 'stdClass', array $arguments = []): object
     {
     }
 
@@ -274,7 +274,7 @@ public function getAdapter(): \PDO
      *
      * @return mixed
      */
-    public function getAttribute(int $attribute)
+    public function getAttribute(int $attribute): mixed
     {
     }
 
@@ -371,7 +371,7 @@ public function perform(string $statement, array $values = []): \PDOStatement
      *
      * @return \PDOStatement|false
      */
-    public function prepare(string $statement, array $options = [])
+    public function prepare(string $statement, array $options = []): \PDOStatement|bool
     {
     }
 
@@ -384,7 +384,7 @@ public function prepare(string $statement, array $options = [])
      *
      * @return \PDOStatement|false
      */
-    public function query(string $statement)
+    public function query(string $statement): \PDOStatement|bool
     {
     }
 
diff --git a/src/DataMapper/Pdo/Connection/ConnectionInterface.php b/src/DataMapper/Pdo/Connection/ConnectionInterface.php
index 20bba058..09f9e2b0 100644
--- a/src/DataMapper/Pdo/Connection/ConnectionInterface.php
+++ b/src/DataMapper/Pdo/Connection/ConnectionInterface.php
@@ -111,7 +111,7 @@ public function fetchGroup(string $statement, array $values = [], int $flags = \
      * @return object
      * @param string $className
      */
-    public function fetchObject(string $statement, array $values = [], string $className = 'stdClass', array $arguments = []);
+    public function fetchObject(string $statement, array $values = [], string $className = 'stdClass', array $arguments = []): object;
 
     /**
      * Fetches a sequential array of rows from the database; the rows are
@@ -162,7 +162,7 @@ public function fetchPairs(string $statement, array $values = []): array;
      *
      * @return mixed
      */
-    public function fetchValue(string $statement, array $values = []);
+    public function fetchValue(string $statement, array $values = []): mixed;
 
     /**
      * Return the inner PDO (if any)
diff --git a/src/DataMapper/Pdo/Connection/PdoInterface.php b/src/DataMapper/Pdo/Connection/PdoInterface.php
index 14b42be3..25680ebe 100644
--- a/src/DataMapper/Pdo/Connection/PdoInterface.php
+++ b/src/DataMapper/Pdo/Connection/PdoInterface.php
@@ -35,7 +35,7 @@ public function commit(): bool;
      *
      * @return string|null
      */
-    public function errorCode(): ?string;
+    public function errorCode(): string|null;
 
     /**
      * Gets the most recent error info.
@@ -61,7 +61,7 @@ public function exec(string $statement): int;
      *
      * @return mixed
      */
-    public function getAttribute(int $attribute);
+    public function getAttribute(int $attribute): mixed;
 
     /**
      * Return an array of available PDO drivers (empty array if none available)
@@ -97,7 +97,7 @@ public function lastInsertId(string $name = null): string;
      *
      * @return \PDOStatement|false
      */
-    public function prepare(string $statement, array $options = []);
+    public function prepare(string $statement, array $options = []): \PDOStatement|bool;
 
     /**
      * Queries the database and returns a PDOStatement. If the profiler is
@@ -108,7 +108,7 @@ public function prepare(string $statement, array $options = []);
      *
      * @return \PDOStatement|false
      */
-    public function query(string $statement);
+    public function query(string $statement): \PDOStatement|bool;
 
     /**
      * Quotes a value for use in an SQL statement. This differs from
diff --git a/src/Db/Adapter/AbstractAdapter.php b/src/Db/Adapter/AbstractAdapter.php
index c8ae39b8..ad4b5c48 100644
--- a/src/Db/Adapter/AbstractAdapter.php
+++ b/src/Db/Adapter/AbstractAdapter.php
@@ -470,7 +470,7 @@ public function fetchAll(string $sqlQuery, int $fetchMode = Enum::FETCH_ASSOC, a
      * @param mixed $column
      * @return string|bool
      */
-    public function fetchColumn(string $sqlQuery, array $placeholders = [], $column = 0)
+    public function fetchColumn(string $sqlQuery, array $placeholders = [], $column = 0): bool|string
     {
     }
 
@@ -623,7 +623,7 @@ public function getDialectType(): string
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
diff --git a/src/Db/Adapter/AdapterInterface.php b/src/Db/Adapter/AdapterInterface.php
index 5441886f..a2a7a5ab 100644
--- a/src/Db/Adapter/AdapterInterface.php
+++ b/src/Db/Adapter/AdapterInterface.php
@@ -287,7 +287,7 @@ public function fetchAll(string $sqlQuery, int $fetchMode = 2, array $bindParams
      * @param mixed $column
      * @return string|bool
      */
-    public function fetchColumn(string $sqlQuery, array $placeholders = [], $column = 0);
+    public function fetchColumn(string $sqlQuery, array $placeholders = [], $column = 0): bool|string;
 
     /**
      * Returns the first row in a SQL query result
@@ -388,7 +388,7 @@ public function getDefaultValue(): RawValue;
      *
      * @return mixed
      */
-    public function getInternalHandler();
+    public function getInternalHandler(): mixed;
 
     /**
      * Returns the savepoint name to use for nested transactions
@@ -488,7 +488,7 @@ public function isUnderTransaction(): bool;
      * @param string|null $name Name of the sequence object from which the ID should be returned.
      * @return string|bool
      */
-    public function lastInsertId(string $name = null);
+    public function lastInsertId(string $name = null): bool|string;
 
     /**
      * Appends a LIMIT clause to sqlQuery argument
@@ -536,7 +536,7 @@ public function modifyColumn(string $tableName, string $schemaName, \Phalcon\Db\
      * @param array $bindTypes
      * @return bool|ResultInterface
      */
-    public function query(string $sqlStatement, array $bindParams = [], array $bindTypes = []);
+    public function query(string $sqlStatement, array $bindParams = [], array $bindTypes = []): ResultInterface|bool;
 
     /**
      * Releases given savepoint
diff --git a/src/Db/Adapter/Pdo/AbstractPdo.php b/src/Db/Adapter/Pdo/AbstractPdo.php
index c89ae7b5..f5c8f894 100644
--- a/src/Db/Adapter/Pdo/AbstractPdo.php
+++ b/src/Db/Adapter/Pdo/AbstractPdo.php
@@ -259,7 +259,7 @@ public function getErrorInfo(): array
      *
      * @return mixed
      */
-    public function getInternalHandler()
+    public function getInternalHandler(): mixed
     {
     }
 
@@ -315,7 +315,7 @@ public function isUnderTransaction(): bool
      * @param string|null $name
      * @return string|bool
      */
-    public function lastInsertId(string $name = null)
+    public function lastInsertId(string $name = null): bool|string
     {
     }
 
@@ -371,7 +371,7 @@ public function prepare(string $sqlStatement): \PDOStatement
      * @param array $bindTypes
      * @return bool|ResultInterface
      */
-    public function query(string $sqlStatement, array $bindParams = [], array $bindTypes = [])
+    public function query(string $sqlStatement, array $bindParams = [], array $bindTypes = []): ResultInterface|bool
     {
     }
 
diff --git a/src/Db/Column.php b/src/Db/Column.php
index 36830e9c..dd352d2d 100644
--- a/src/Db/Column.php
+++ b/src/Db/Column.php
@@ -344,7 +344,7 @@ public function __construct(string $name, array $definition)
      *
      * @return string|null
      */
-    public function getAfterPosition(): ?string
+    public function getAfterPosition(): string|null
     {
     }
 
@@ -362,7 +362,7 @@ public function getBindType(): int
      *
      * @return string|null
      */
-    public function getComment(): ?string
+    public function getComment(): string|null
     {
     }
 
@@ -371,7 +371,7 @@ public function getComment(): ?string
      *
      * @return mixed
      */
-    public function getDefault()
+    public function getDefault(): mixed
     {
     }
 
@@ -398,7 +398,7 @@ public function getScale(): int
      *
      * @return int|string
      */
-    public function getSize()
+    public function getSize(): int|string
     {
     }
 
@@ -425,7 +425,7 @@ public function getTypeReference(): int
      *
      * @return array|string
      */
-    public function getTypeValues()
+    public function getTypeValues(): string|array
     {
     }
 
diff --git a/src/Db/ColumnInterface.php b/src/Db/ColumnInterface.php
index 105a05aa..b0850240 100644
--- a/src/Db/ColumnInterface.php
+++ b/src/Db/ColumnInterface.php
@@ -19,7 +19,7 @@ interface ColumnInterface
      *
      * @return string|null
      */
-    public function getAfterPosition(): ?string;
+    public function getAfterPosition(): string|null;
 
     /**
      * Returns the type of bind handling
@@ -33,7 +33,7 @@ public function getBindType(): int;
      *
      * @return mixed
      */
-    public function getDefault();
+    public function getDefault(): mixed;
 
     /**
      * Returns column name
@@ -54,7 +54,7 @@ public function getScale(): int;
      *
      * @return int|string
      */
-    public function getSize();
+    public function getSize(): int|string;
 
     /**
      * Returns column type
@@ -75,7 +75,7 @@ public function getTypeReference(): int;
      *
      * @return array|string
      */
-    public function getTypeValues();
+    public function getTypeValues(): string|array;
 
     /**
      * Check whether column has default value
diff --git a/src/Db/ResultInterface.php b/src/Db/ResultInterface.php
index e080f615..34247cd8 100644
--- a/src/Db/ResultInterface.php
+++ b/src/Db/ResultInterface.php
@@ -38,7 +38,7 @@ public function execute(): bool;
      *
      * @return mixed
      */
-    public function fetch();
+    public function fetch(): mixed;
 
     /**
      * Returns an array of arrays containing all the records in the result. This
@@ -56,7 +56,7 @@ public function fetchAll(): array;
      *
      * @return mixed
      */
-    public function fetchArray();
+    public function fetchArray(): mixed;
 
     /**
      * Gets the internal PDO result object
diff --git a/src/Di/Di.php b/src/Di/Di.php
index ba3669e6..1dbf9696 100644
--- a/src/Di/Di.php
+++ b/src/Di/Di.php
@@ -104,7 +104,7 @@ public function __construct()
      * @param array $arguments
      * @return mixed|null
      */
-    public function __call(string $method, array $arguments = [])
+    public function __call(string $method, array $arguments = []): mixed
     {
     }
 
@@ -118,7 +118,7 @@ public function __call(string $method, array $arguments = [])
      * @param bool $shared
      * @return bool|ServiceInterface
      */
-    public function attempt(string $name, $definition, bool $shared = false)
+    public function attempt(string $name, $definition, bool $shared = false): ServiceInterface|bool
     {
     }
 
@@ -129,7 +129,7 @@ public function attempt(string $name, $definition, bool $shared = false)
      * @param mixed $parameters
      * @return mixed
      */
-    public function get(string $name, $parameters = null)
+    public function get(string $name, $parameters = null): mixed
     {
     }
 
@@ -138,7 +138,7 @@ public function get(string $name, $parameters = null)
      *
      * @return DiInterface|null
      */
-    public static function getDefault(): ?DiInterface
+    public static function getDefault(): DiInterface|null
     {
     }
 
@@ -147,7 +147,7 @@ public static function getDefault(): ?DiInterface
      *
      * @return ManagerInterface|null
      */
-    public function getInternalEventsManager(): ?ManagerInterface
+    public function getInternalEventsManager(): ManagerInterface|null
     {
     }
 
@@ -157,7 +157,7 @@ public function getInternalEventsManager(): ?ManagerInterface
      * @param string $name
      * @return mixed
      */
-    public function getRaw(string $name)
+    public function getRaw(string $name): mixed
     {
     }
 
@@ -188,7 +188,7 @@ public function getServices(): array
      * @param mixed $parameters
      * @return mixed
      */
-    public function getShared(string $name, $parameters = null)
+    public function getShared(string $name, $parameters = null): mixed
     {
     }
 
@@ -300,7 +300,7 @@ public function has(string $name): bool
      * @param mixed $name
      * @return mixed
      */
-    public function offsetGet($name)
+    public function offsetGet($name): mixed
     {
     }
 
diff --git a/src/Di/DiInterface.php b/src/Di/DiInterface.php
index 45848f56..129a3627 100644
--- a/src/Di/DiInterface.php
+++ b/src/Di/DiInterface.php
@@ -26,7 +26,7 @@ interface DiInterface extends \ArrayAccess
      * @param bool $shared
      * @return bool|ServiceInterface
      */
-    public function attempt(string $name, $definition, bool $shared = false);
+    public function attempt(string $name, $definition, bool $shared = false): ServiceInterface|bool;
 
     /**
      * Resolves the service based on its configuration
@@ -35,14 +35,14 @@ public function attempt(string $name, $definition, bool $shared = false);
      * @param mixed $parameters
      * @return mixed
      */
-    public function get(string $name, $parameters = null);
+    public function get(string $name, $parameters = null): mixed;
 
     /**
      * Return the last DI created
      *
      * @return DiInterface|null
      */
-    public static function getDefault(): ?DiInterface;
+    public static function getDefault(): DiInterface|null;
 
     /**
      * Returns a service definition without resolving
@@ -50,7 +50,7 @@ public static function getDefault(): ?DiInterface;
      * @param string $name
      * @return mixed
      */
-    public function getRaw(string $name);
+    public function getRaw(string $name): mixed;
 
     /**
      * Returns the corresponding Phalcon\Di\Service instance for a service
@@ -74,7 +74,7 @@ public function getServices(): array;
      * @param mixed $parameters
      * @return mixed
      */
-    public function getShared(string $name, $parameters = null);
+    public function getShared(string $name, $parameters = null): mixed;
 
     /**
      * Check whether the DI contains a service by a name
diff --git a/src/Di/Injectable.php b/src/Di/Injectable.php
index 1d60e5a2..17acd61a 100644
--- a/src/Di/Injectable.php
+++ b/src/Di/Injectable.php
@@ -57,7 +57,7 @@ abstract class Injectable extends stdClass implements \Phalcon\Di\InjectionAware
      * @param string $propertyName
      * @return mixed|null
      */
-    public function __get(string $propertyName)
+    public function __get(string $propertyName): mixed
     {
     }
 
diff --git a/src/Di/Service.php b/src/Di/Service.php
index 2c38e312..4b476eb2 100644
--- a/src/Di/Service.php
+++ b/src/Di/Service.php
@@ -62,7 +62,7 @@ final public function __construct($definition, bool $shared = false)
      *
      * @return mixed
      */
-    public function getDefinition()
+    public function getDefinition(): mixed
     {
     }
 
@@ -101,7 +101,7 @@ public function isShared(): bool
      * @param DiInterface $container
      * @return mixed
      */
-    public function resolve($parameters = null, DiInterface $container = null)
+    public function resolve($parameters = null, DiInterface $container = null): mixed
     {
     }
 
diff --git a/src/Di/ServiceInterface.php b/src/Di/ServiceInterface.php
index 7d6db4dc..caae26ab 100644
--- a/src/Di/ServiceInterface.php
+++ b/src/Di/ServiceInterface.php
@@ -19,7 +19,7 @@ interface ServiceInterface
      *
      * @return mixed
      */
-    public function getDefinition();
+    public function getDefinition(): mixed;
 
     /**
      * Returns a parameter in a specific position
@@ -50,7 +50,7 @@ public function isShared(): bool;
      * @param DiInterface $container
      * @return mixed
      */
-    public function resolve($parameters = null, DiInterface $container = null);
+    public function resolve($parameters = null, DiInterface $container = null): mixed;
 
     /**
      * Set the service definition
diff --git a/src/Dispatcher/AbstractDispatcher.php b/src/Dispatcher/AbstractDispatcher.php
index 29adc1d9..85a14b7a 100644
--- a/src/Dispatcher/AbstractDispatcher.php
+++ b/src/Dispatcher/AbstractDispatcher.php
@@ -170,7 +170,7 @@ public function callActionMethod($handler, string $actionMethod, array $params =
      *
      * @throws \Exception if any uncaught or unhandled exception occurs during the dispatcher process.
      */
-    public function dispatch()
+    public function dispatch(): mixed
     {
     }
 
@@ -255,7 +255,7 @@ public function getDefaultNamespace(): string
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -273,7 +273,7 @@ public function getHandlerSuffix(): string
      *
      * @return BinderInterface|null
      */
-    public function getModelBinder(): ?BinderInterface
+    public function getModelBinder(): BinderInterface|null
     {
     }
 
@@ -282,7 +282,7 @@ public function getModelBinder(): ?BinderInterface
      *
      * @return string|null
      */
-    public function getModuleName(): ?string
+    public function getModuleName(): string|null
     {
     }
 
@@ -305,7 +305,7 @@ public function getNamespaceName(): string
      *
      * @todo remove this in future versions
      */
-    public function getParam($param, $filters = null, $defaultValue = null)
+    public function getParam($param, $filters = null, $defaultValue = null): mixed
     {
     }
 
@@ -317,7 +317,7 @@ public function getParam($param, $filters = null, $defaultValue = null)
      * @param mixed $defaultValue
      * @return mixed
      */
-    public function getParameter($param, $filters = null, $defaultValue = null)
+    public function getParameter($param, $filters = null, $defaultValue = null): mixed
     {
     }
 
@@ -546,7 +546,7 @@ public function setNamespaceName(string $namespaceName): void
      *
      * @return mixed
      */
-    public function getReturnedValue()
+    public function getReturnedValue(): mixed
     {
     }
 
diff --git a/src/Dispatcher/DispatcherInterface.php b/src/Dispatcher/DispatcherInterface.php
index 564198c4..ec96fabc 100644
--- a/src/Dispatcher/DispatcherInterface.php
+++ b/src/Dispatcher/DispatcherInterface.php
@@ -19,7 +19,7 @@ interface DispatcherInterface
      *
      * @return mixed
      */
-    public function dispatch();
+    public function dispatch(): mixed;
 
     /**
      * Forwards the execution flow to another controller/action
@@ -57,7 +57,7 @@ public function getHandlerSuffix(): string;
      * @param mixed $param
      * @return mixed
      */
-    public function getParam($param, $filters = null);
+    public function getParam($param, $filters = null): mixed;
 
     /**
      * Gets a param by its name or numeric index
@@ -66,7 +66,7 @@ public function getParam($param, $filters = null);
      * @param mixed $param
      * @return mixed
      */
-    public function getParameter($param, $filters = null);
+    public function getParameter($param, $filters = null): mixed;
 
     /**
      * Gets action params
@@ -87,7 +87,7 @@ public function getParameters(): array;
      *
      * @return mixed
      */
-    public function getReturnedValue();
+    public function getReturnedValue(): mixed;
 
     /**
      * Check if a param exists
diff --git a/src/Domain/Payload/Payload.php b/src/Domain/Payload/Payload.php
index 589c7c6f..82b43b93 100644
--- a/src/Domain/Payload/Payload.php
+++ b/src/Domain/Payload/Payload.php
@@ -63,7 +63,7 @@ class Payload implements \Phalcon\Domain\Payload\PayloadInterface
      *
      * @return Throwable|null
      */
-    public function getException(): ?Throwable
+    public function getException(): Throwable|null
     {
     }
 
@@ -72,7 +72,7 @@ public function getException(): ?Throwable
      *
      * @return mixed
      */
-    public function getExtras()
+    public function getExtras(): mixed
     {
     }
 
@@ -81,7 +81,7 @@ public function getExtras()
      *
      * @return mixed
      */
-    public function getInput()
+    public function getInput(): mixed
     {
     }
 
@@ -90,7 +90,7 @@ public function getInput()
      *
      * @return mixed
      */
-    public function getMessages()
+    public function getMessages(): mixed
     {
     }
 
@@ -99,7 +99,7 @@ public function getMessages()
      *
      * @return mixed
      */
-    public function getStatus()
+    public function getStatus(): mixed
     {
     }
 
@@ -108,7 +108,7 @@ public function getStatus()
      *
      * @return mixed
      */
-    public function getOutput()
+    public function getOutput(): mixed
     {
     }
 
diff --git a/src/Domain/Payload/ReadableInterface.php b/src/Domain/Payload/ReadableInterface.php
index 7521e149..d59d23bf 100644
--- a/src/Domain/Payload/ReadableInterface.php
+++ b/src/Domain/Payload/ReadableInterface.php
@@ -21,40 +21,40 @@ interface ReadableInterface
      *
      * @return Throwable|null
      */
-    public function getException(): ?Throwable;
+    public function getException(): Throwable|null;
 
     /**
      * Gets arbitrary extra values produced by the domain layer.
      *
      * @return mixed
      */
-    public function getExtras();
+    public function getExtras(): mixed;
 
     /**
      * Gets the input received by the domain layer.
      *
      * @return mixed
      */
-    public function getInput();
+    public function getInput(): mixed;
 
     /**
      * Gets the messages produced by the domain layer.
      *
      * @return mixed
      */
-    public function getMessages();
+    public function getMessages(): mixed;
 
     /**
      * Gets the output produced from the domain layer.
      *
      * @return mixed
      */
-    public function getOutput();
+    public function getOutput(): mixed;
 
     /**
      * Gets the status of this payload.
      *
      * @return mixed
      */
-    public function getStatus();
+    public function getStatus(): mixed;
 }
diff --git a/src/Encryption/Crypt.php b/src/Encryption/Crypt.php
index 810fa4f2..ffdbe90e 100644
--- a/src/Encryption/Crypt.php
+++ b/src/Encryption/Crypt.php
@@ -549,7 +549,7 @@ protected function phpFunctionExists(string $name): bool
      * @param string $cipher
      * @return int|bool
      */
-    protected function phpOpensslCipherIvLength(string $cipher)
+    protected function phpOpensslCipherIvLength(string $cipher): int|bool
     {
     }
 
diff --git a/src/Encryption/Security.php b/src/Encryption/Security.php
index 70076691..a58e7621 100644
--- a/src/Encryption/Security.php
+++ b/src/Encryption/Security.php
@@ -222,7 +222,7 @@ public function getRandomBytes(): int
      *
      * @return string|null
      */
-    public function getRequestToken(): ?string
+    public function getRequestToken(): string|null
     {
     }
 
@@ -231,7 +231,7 @@ public function getRequestToken(): ?string
      *
      * @return string|null
      */
-    public function getSessionToken(): ?string
+    public function getSessionToken(): string|null
     {
     }
 
@@ -255,7 +255,7 @@ public function getSaltBytes(int $numberBytes = 0): string
      * @return string
      * @throws Exception
      */
-    public function getToken(): ?string
+    public function getToken(): string|null
     {
     }
 
@@ -266,7 +266,7 @@ public function getToken(): ?string
      * @return string|null
      * @throws Exception
      */
-    public function getTokenKey(): ?string
+    public function getTokenKey(): string|null
     {
     }
 
@@ -383,7 +383,7 @@ private function processCost(array $options = []): int
      *
      * @return string|null
      */
-    private function processTokenKey(string $tokenKey = null): ?string
+    private function processTokenKey(string $tokenKey = null): string|null
     {
     }
 
@@ -393,7 +393,7 @@ private function processTokenKey(string $tokenKey = null): ?string
      *
      * @return string|null
      */
-    private function processUserToken(string $tokenKey, string $tokenValue = null): ?string
+    private function processUserToken(string $tokenKey, string $tokenValue = null): string|null
     {
     }
 }
diff --git a/src/Encryption/Security/JWT/Builder.php b/src/Encryption/Security/JWT/Builder.php
index f51888f4..1bc108c9 100644
--- a/src/Encryption/Security/JWT/Builder.php
+++ b/src/Encryption/Security/JWT/Builder.php
@@ -115,14 +115,14 @@ public function getClaims(): array
     /**
      * @return string|null
      */
-    public function getContentType(): ?string
+    public function getContentType(): string|null
     {
     }
 
     /**
      * @return int|null
      */
-    public function getExpirationTime(): ?int
+    public function getExpirationTime(): int|null
     {
     }
 
@@ -136,35 +136,35 @@ public function getHeaders(): array
     /**
      * @return string|null
      */
-    public function getId(): ?string
+    public function getId(): string|null
     {
     }
 
     /**
      * @return int|null
      */
-    public function getIssuedAt(): ?int
+    public function getIssuedAt(): int|null
     {
     }
 
     /**
      * @return string|null
      */
-    public function getIssuer(): ?string
+    public function getIssuer(): string|null
     {
     }
 
     /**
      * @return int|null
      */
-    public function getNotBefore(): ?int
+    public function getNotBefore(): int|null
     {
     }
 
     /**
      * @return string|null
      */
-    public function getSubject(): ?string
+    public function getSubject(): string|null
     {
     }
 
diff --git a/src/Encryption/Security/JWT/Token/Item.php b/src/Encryption/Security/JWT/Token/Item.php
index 6538eacd..abee784c 100644
--- a/src/Encryption/Security/JWT/Token/Item.php
+++ b/src/Encryption/Security/JWT/Token/Item.php
@@ -30,7 +30,7 @@ public function __construct(array $payload, string $encoded)
      *
      * @return mixed|null
      */
-    public function get(string $name, $defaultValue = null)
+    public function get(string $name, $defaultValue = null): mixed
     {
     }
 
diff --git a/src/Encryption/Security/JWT/Validator.php b/src/Encryption/Security/JWT/Validator.php
index f6e7423a..bc99e75e 100644
--- a/src/Encryption/Security/JWT/Validator.php
+++ b/src/Encryption/Security/JWT/Validator.php
@@ -65,7 +65,7 @@ public function getErrors(): array
      *
      * @return mixed
      */
-    public function get(string $claim)
+    public function get(string $claim): mixed
     {
     }
 
diff --git a/src/Events/AbstractEventsAware.php b/src/Events/AbstractEventsAware.php
index fbf20594..0122db1e 100644
--- a/src/Events/AbstractEventsAware.php
+++ b/src/Events/AbstractEventsAware.php
@@ -26,7 +26,7 @@ abstract class AbstractEventsAware
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -49,7 +49,7 @@ public function setEventsManager(\Phalcon\Events\ManagerInterface $eventsManager
      *
      * @return mixed|bool
      */
-    protected function fireManagerEvent(string $eventName, $data = null, bool $cancellable = true)
+    protected function fireManagerEvent(string $eventName, $data = null, bool $cancellable = true): mixed
     {
     }
 }
diff --git a/src/Events/Event.php b/src/Events/Event.php
index 696cad71..da6a8e5a 100644
--- a/src/Events/Event.php
+++ b/src/Events/Event.php
@@ -74,14 +74,14 @@ public function __construct(string $type, $source = null, $data = null, bool $ca
     /**
      * @return mixed
      */
-    public function getData()
+    public function getData(): mixed
     {
     }
 
     /**
      * @return object|null
      */
-    public function getSource()
+    public function getSource(): object|null
     {
     }
 
diff --git a/src/Events/EventInterface.php b/src/Events/EventInterface.php
index 46826ae0..1dfbf6ea 100644
--- a/src/Events/EventInterface.php
+++ b/src/Events/EventInterface.php
@@ -19,14 +19,14 @@ interface EventInterface
      *
      * @return mixed
      */
-    public function getData();
+    public function getData(): mixed;
 
     /**
      * Gets event type
      *
      * @return mixed
      */
-    public function getType();
+    public function getType(): mixed;
 
     /**
      * Check whether the event is cancelable
diff --git a/src/Events/EventsAwareInterface.php b/src/Events/EventsAwareInterface.php
index 94fcc701..ce9e45c0 100644
--- a/src/Events/EventsAwareInterface.php
+++ b/src/Events/EventsAwareInterface.php
@@ -20,7 +20,7 @@ interface EventsAwareInterface
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface;
+    public function getEventsManager(): ManagerInterface|null;
 
     /**
      * Sets the events manager
diff --git a/src/Factory/AbstractFactory.php b/src/Factory/AbstractFactory.php
index c7cb8b99..49e9553e 100644
--- a/src/Factory/AbstractFactory.php
+++ b/src/Factory/AbstractFactory.php
@@ -44,7 +44,7 @@ abstract protected function getServices(): array;
      * @param string $name
      * @return mixed
      */
-    protected function getService(string $name)
+    protected function getService(string $name): mixed
     {
     }
 
diff --git a/src/Filter/Filter.php b/src/Filter/Filter.php
index 094cbcdb..e6ba6da1 100644
--- a/src/Filter/Filter.php
+++ b/src/Filter/Filter.php
@@ -125,7 +125,7 @@ public function __call(string $name, array $args)
      * @return mixed
      * @throws Exception
      */
-    public function get(string $name)
+    public function get(string $name): mixed
     {
     }
 
@@ -150,7 +150,7 @@ public function has(string $name): bool
      * @return array|false|mixed|null
      * @throws Exception
      */
-    public function sanitize($value, $sanitizers, bool $noRecursive = false)
+    public function sanitize($value, $sanitizers, bool $noRecursive = false): mixed
     {
     }
 
diff --git a/src/Filter/FilterInterface.php b/src/Filter/FilterInterface.php
index 53036b34..6ab06f35 100644
--- a/src/Filter/FilterInterface.php
+++ b/src/Filter/FilterInterface.php
@@ -23,5 +23,5 @@ interface FilterInterface
      *
      * @return mixed
      */
-    public function sanitize($value, $sanitizers, bool $noRecursive = false);
+    public function sanitize($value, $sanitizers, bool $noRecursive = false): mixed;
 }
diff --git a/src/Filter/Validation.php b/src/Filter/Validation.php
index 6001c886..f5408c98 100644
--- a/src/Filter/Validation.php
+++ b/src/Filter/Validation.php
@@ -115,7 +115,7 @@ public function bind($entity, $data): ValidationInterface
     /**
      * @return mixed
      */
-    public function getData()
+    public function getData(): mixed
     {
     }
 
@@ -124,7 +124,7 @@ public function getData()
      *
      * @return object
      */
-    public function getEntity()
+    public function getEntity(): mixed
     {
     }
 
@@ -134,7 +134,7 @@ public function getEntity()
      * @param string $field
      * @return mixed|null
      */
-    public function getFilters(string $field = null)
+    public function getFilters(string $field = null): mixed
     {
     }
 
@@ -173,7 +173,7 @@ public function getValidators(): array
      * @param string $field
      * @return mixed|null
      */
-    public function getValueByEntity($entity, string $field)
+    public function getValueByEntity($entity, string $field): mixed
     {
     }
 
@@ -184,7 +184,7 @@ public function getValueByEntity($entity, string $field)
      * @param string $field
      * @return mixed|null
      */
-    public function getValueByData($data, string $field)
+    public function getValueByData($data, string $field): mixed
     {
     }
 
@@ -194,7 +194,7 @@ public function getValueByData($data, string $field)
      * @param string $field
      * @return mixed|null
      */
-    public function getValue(string $field)
+    public function getValue(string $field): mixed
     {
     }
 
@@ -267,7 +267,7 @@ public function setValidators(array $validators): Validation
      * @param object $entity *
      * @return Messages|false
      */
-    public function validate($data = null, $entity = null)
+    public function validate($data = null, $entity = null): Messages|bool
     {
     }
 
diff --git a/src/Filter/Validation/AbstractValidator.php b/src/Filter/Validation/AbstractValidator.php
index d25ac478..f5d1349c 100644
--- a/src/Filter/Validation/AbstractValidator.php
+++ b/src/Filter/Validation/AbstractValidator.php
@@ -55,7 +55,7 @@ public function __construct(array $options = [])
      *
      * @return mixed
      */
-    public function getOption(string $key, $defaultValue = null)
+    public function getOption(string $key, $defaultValue = null): mixed
     {
     }
 
@@ -166,7 +166,7 @@ protected function allowEmpty($field, $value): bool
      *
      * @return mixed
      */
-    protected function checkArray($value, string $field)
+    protected function checkArray($value, string $field): mixed
     {
     }
 
@@ -189,7 +189,7 @@ protected function prepareCode(string $field): int
      *
      * @return mixed
      */
-    protected function prepareLabel(\Phalcon\Filter\Validation $validation, string $field)
+    protected function prepareLabel(\Phalcon\Filter\Validation $validation, string $field): mixed
     {
     }
 }
diff --git a/src/Filter/Validation/ValidationInterface.php b/src/Filter/Validation/ValidationInterface.php
index 4f762607..2461590b 100644
--- a/src/Filter/Validation/ValidationInterface.php
+++ b/src/Filter/Validation/ValidationInterface.php
@@ -50,7 +50,7 @@ public function bind($entity, $data): ValidationInterface;
      *
      * @return object
      */
-    public function getEntity();
+    public function getEntity(): mixed;
 
     /**
      * Returns all the filters or a specific one
@@ -58,7 +58,7 @@ public function getEntity();
      * @param string $field
      * @return mixed|null
      */
-    public function getFilters(string $field = null);
+    public function getFilters(string $field = null): mixed;
 
     /**
      * Get label for field
@@ -88,7 +88,7 @@ public function getValidators(): array;
      * @param string $field
      * @return mixed|null
      */
-    public function getValue(string $field);
+    public function getValue(string $field): mixed;
 
     /**
      * Alias of `add` method
@@ -132,5 +132,5 @@ public function setLabels(array $labels): void;
      * @param object $entity *
      * @return Messages|false
      */
-    public function validate($data = null, $entity = null);
+    public function validate($data = null, $entity = null): Messages|bool;
 }
diff --git a/src/Filter/Validation/ValidatorInterface.php b/src/Filter/Validation/ValidatorInterface.php
index 0b84f4b3..da611a6c 100644
--- a/src/Filter/Validation/ValidatorInterface.php
+++ b/src/Filter/Validation/ValidatorInterface.php
@@ -24,7 +24,7 @@ interface ValidatorInterface
      * @param string $key
      * @param mixed $defaultValue
      */
-    public function getOption(string $key, $defaultValue = null);
+    public function getOption(string $key, $defaultValue = null): mixed;
 
     /**
      * Get the template message
diff --git a/src/Flash/AbstractFlash.php b/src/Flash/AbstractFlash.php
index 9ae7498d..d2f8d239 100644
--- a/src/Flash/AbstractFlash.php
+++ b/src/Flash/AbstractFlash.php
@@ -111,7 +111,7 @@ public function clear(): void
      *
      * @return string|null
      */
-    public function error(string $message): ?string
+    public function error(string $message): string|null
     {
     }
 
@@ -171,7 +171,7 @@ public function getEscaperService(): EscaperInterface
      *
      * @return string|null
      */
-    public function notice(string $message): ?string
+    public function notice(string $message): string|null
     {
     }
 
@@ -257,7 +257,7 @@ public function setImplicitFlush(bool $implicitFlush): AbstractFlash
      *
      * @return string|null
      */
-    public function success(string $message): ?string
+    public function success(string $message): string|null
     {
     }
 
@@ -274,7 +274,7 @@ public function success(string $message): ?string
      * @return string|null
      * @throws Exception
      */
-    public function outputMessage(string $type, $message): ?string
+    public function outputMessage(string $type, $message): string|null
     {
     }
 
@@ -289,7 +289,7 @@ public function outputMessage(string $type, $message): ?string
      *
      * @return string|null
      */
-    public function warning(string $message): ?string
+    public function warning(string $message): string|null
     {
     }
 
diff --git a/src/Flash/Direct.php b/src/Flash/Direct.php
index 4c70a180..341a3d8e 100644
--- a/src/Flash/Direct.php
+++ b/src/Flash/Direct.php
@@ -25,7 +25,7 @@ class Direct extends \Phalcon\Flash\AbstractFlash
      * @return string|null
      * @throws Exception
      */
-    public function message(string $type, $message): ?string
+    public function message(string $type, $message): string|null
     {
     }
 
diff --git a/src/Flash/FlashInterface.php b/src/Flash/FlashInterface.php
index df8d7519..f0450924 100644
--- a/src/Flash/FlashInterface.php
+++ b/src/Flash/FlashInterface.php
@@ -23,7 +23,7 @@ interface FlashInterface
      *
      * @return string|null
      */
-    public function error(string $message): ?string;
+    public function error(string $message): string|null;
 
     /**
      * Outputs a message
@@ -33,7 +33,7 @@ public function error(string $message): ?string;
      *
      * @return string|null
      */
-    public function message(string $type, string $message): ?string;
+    public function message(string $type, string $message): string|null;
 
     /**
      * Shows a HTML notice/information message
@@ -42,7 +42,7 @@ public function message(string $type, string $message): ?string;
      *
      * @return string|null
      */
-    public function notice(string $message): ?string;
+    public function notice(string $message): string|null;
 
     /**
      * Shows a HTML success message
@@ -51,7 +51,7 @@ public function notice(string $message): ?string;
      *
      * @return string|null
      */
-    public function success(string $message): ?string;
+    public function success(string $message): string|null;
 
     /**
      * Shows a HTML warning message
@@ -60,5 +60,5 @@ public function success(string $message): ?string;
      *
      * @return string|null
      */
-    public function warning(string $message): ?string;
+    public function warning(string $message): string|null;
 }
diff --git a/src/Flash/Session.php b/src/Flash/Session.php
index 7850ac18..bea59799 100644
--- a/src/Flash/Session.php
+++ b/src/Flash/Session.php
@@ -69,7 +69,7 @@ public function has(string $type = null): bool
      * @return string|null
      * @throws Exception
      */
-    public function message(string $type, $message): ?string
+    public function message(string $type, $message): string|null
     {
     }
 
diff --git a/src/Forms/Element/AbstractElement.php b/src/Forms/Element/AbstractElement.php
index 4121461a..b8dac501 100644
--- a/src/Forms/Element/AbstractElement.php
+++ b/src/Forms/Element/AbstractElement.php
@@ -156,7 +156,7 @@ public function clear(): ElementInterface
      * @param mixed $defaultValue
      * @return mixed
      */
-    public function getAttribute(string $attribute, $defaultValue = null)
+    public function getAttribute(string $attribute, $defaultValue = null): mixed
     {
     }
 
@@ -174,7 +174,7 @@ public function getAttributes(): array
      *
      * @return mixed
      */
-    public function getDefault()
+    public function getDefault(): mixed
     {
     }
 
@@ -229,7 +229,7 @@ public function getName(): string
      *
      * @return TagFactory|null
      */
-    public function getTagFactory(): ?TagFactory
+    public function getTagFactory(): TagFactory|null
     {
     }
 
@@ -240,7 +240,7 @@ public function getTagFactory(): ?TagFactory
      * @param mixed $defaultValue
      * @return mixed
      */
-    public function getUserOption(string $option, $defaultValue = null)
+    public function getUserOption(string $option, $defaultValue = null): mixed
     {
     }
 
@@ -267,7 +267,7 @@ public function getValidators(): array
      *
      * @return mixed
      */
-    public function getValue()
+    public function getValue(): mixed
     {
     }
 
diff --git a/src/Forms/Element/ElementInterface.php b/src/Forms/Element/ElementInterface.php
index d5f76076..d8c94a93 100644
--- a/src/Forms/Element/ElementInterface.php
+++ b/src/Forms/Element/ElementInterface.php
@@ -66,7 +66,7 @@ public function clear(): ElementInterface;
      * @param mixed $defaultValue
      * @return mixed
      */
-    public function getAttribute(string $attribute, $defaultValue = null);
+    public function getAttribute(string $attribute, $defaultValue = null): mixed;
 
     /**
      * Returns the default attributes for the element
@@ -80,7 +80,7 @@ public function getAttributes(): array;
      *
      * @return mixed
      */
-    public function getDefault();
+    public function getDefault(): mixed;
 
     /**
      * Returns the element's filters
@@ -125,7 +125,7 @@ public function getName(): string;
      * @param mixed $defaultValue
      * @return mixed
      */
-    public function getUserOption(string $option, $defaultValue = null);
+    public function getUserOption(string $option, $defaultValue = null): mixed;
 
     /**
      * Returns the options for the element
@@ -146,7 +146,7 @@ public function getValidators(): array;
      *
      * @return mixed
      */
-    public function getValue();
+    public function getValue(): mixed;
 
     /**
      * Checks whether there are messages attached to the element
diff --git a/src/Forms/Form.php b/src/Forms/Form.php
index 9042e5ee..6476bd9f 100644
--- a/src/Forms/Form.php
+++ b/src/Forms/Form.php
@@ -146,7 +146,7 @@ public function count(): int
      *
      * @return mixed
      */
-    public function current()
+    public function current(): mixed
     {
     }
 
@@ -202,7 +202,7 @@ public function getEntity()
      * @param string $name
      * @return mixed|null
      */
-    public function getFilteredValue(string $name)
+    public function getFilteredValue(string $name): mixed
     {
     }
 
@@ -231,7 +231,7 @@ public function getLabel(string $name): string
      *
      * @return array|Messages
      */
-    public function getMessages()
+    public function getMessages(): Messages|array
     {
     }
 
@@ -250,7 +250,7 @@ public function getMessagesFor(string $name): Messages
      *
      * @return TagFactory|null
      */
-    public function getTagFactory(): ?TagFactory
+    public function getTagFactory(): TagFactory|null
     {
     }
 
@@ -261,7 +261,7 @@ public function getTagFactory(): ?TagFactory
      * @param mixed $defaultValue
      * @return mixed
      */
-    public function getUserOption(string $option, $defaultValue = null)
+    public function getUserOption(string $option, $defaultValue = null): mixed
     {
     }
 
@@ -280,7 +280,7 @@ public function getUserOptions(): array
      * @param string $name
      * @return mixed|null
      */
-    public function getValue(string $name)
+    public function getValue(string $name): mixed
     {
     }
 
@@ -289,7 +289,7 @@ public function getValue(string $name)
      *
      * @return ValidationInterface|null
      */
-    public function getValidation(): ?ValidationInterface
+    public function getValidation(): ValidationInterface|null
     {
     }
 
diff --git a/src/Html/Escaper.php b/src/Html/Escaper.php
index 8d76a301..ce4b1bcc 100644
--- a/src/Html/Escaper.php
+++ b/src/Html/Escaper.php
@@ -86,7 +86,7 @@ public function css(string $input): string
      *
      * @return string|null
      */
-    final public function detectEncoding(string $input): ?string
+    final public function detectEncoding(string $input): string|null
     {
     }
 
diff --git a/src/Html/Link/Serializer/Header.php b/src/Html/Link/Serializer/Header.php
index 1c284ddf..e3363d1f 100644
--- a/src/Html/Link/Serializer/Header.php
+++ b/src/Html/Link/Serializer/Header.php
@@ -20,7 +20,7 @@ class Header implements \Phalcon\Html\Link\Serializer\SerializerInterface
      * @param array $links
      * @return string|null
      */
-    public function serialize(array $links): ?string
+    public function serialize(array $links): string|null
     {
     }
 }
diff --git a/src/Html/Link/Serializer/SerializerInterface.php b/src/Html/Link/Serializer/SerializerInterface.php
index aa1a5032..7dbc437d 100644
--- a/src/Html/Link/Serializer/SerializerInterface.php
+++ b/src/Html/Link/Serializer/SerializerInterface.php
@@ -20,5 +20,5 @@ interface SerializerInterface
      * @param array $links
      * @return string|null
      */
-    public function serialize(array $links): ?string;
+    public function serialize(array $links): string|null;
 }
diff --git a/src/Html/TagFactory.php b/src/Html/TagFactory.php
index 60a5e66f..6456dec2 100644
--- a/src/Html/TagFactory.php
+++ b/src/Html/TagFactory.php
@@ -149,7 +149,7 @@ public function has(string $name): bool
      * @return mixed
      * @throws Exception
      */
-    public function newInstance(string $name)
+    public function newInstance(string $name): mixed
     {
     }
 
diff --git a/src/Http/Cookie.php b/src/Http/Cookie.php
index f3e7b36d..7984f4e9 100644
--- a/src/Http/Cookie.php
+++ b/src/Http/Cookie.php
@@ -194,7 +194,7 @@ public function getSecure(): bool
      * @param mixed $defaultValue
      * @return mixed
      */
-    public function getValue($filters = null, $defaultValue = null)
+    public function getValue($filters = null, $defaultValue = null): mixed
     {
     }
 
@@ -346,7 +346,7 @@ protected function assertSignKeyIsLongEnough(string $signKey): void
      * @param mixed $defaultValue
      * @return mixed
      */
-    private function getArrVal(array $collection, $index, $defaultValue = null)
+    private function getArrVal(array $collection, $index, $defaultValue = null): mixed
     {
     }
 }
diff --git a/src/Http/Cookie/CookieInterface.php b/src/Http/Cookie/CookieInterface.php
index 9d3aecdc..13cace3a 100644
--- a/src/Http/Cookie/CookieInterface.php
+++ b/src/Http/Cookie/CookieInterface.php
@@ -76,7 +76,7 @@ public function getSecure(): bool;
      * @param mixed $defaultValue
      * @return mixed
      */
-    public function getValue($filters = null, $defaultValue = null);
+    public function getValue($filters = null, $defaultValue = null): mixed;
 
     /**
      * Check if the cookie is using implicit encryption
diff --git a/src/Http/Request.php b/src/Http/Request.php
index 1b5e7549..d0ed35bd 100644
--- a/src/Http/Request.php
+++ b/src/Http/Request.php
@@ -103,7 +103,7 @@ class Request extends AbstractInjectionAware implements \Phalcon\Http\RequestInt
      * @param bool $noRecursive
      * @return mixed
      */
-    public function get(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function get(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -123,7 +123,7 @@ public function getAcceptableContent(): array
      *
      * @return array|null
      */
-    public function getBasicAuth(): ?array
+    public function getBasicAuth(): array|null
     {
     }
 
@@ -190,7 +190,7 @@ public function getPreferredIsoLocaleVariant(): string
      * @param bool $trustForwardedHeader
      * @return string|bool
      */
-    public function getClientAddress(bool $trustForwardedHeader = false)
+    public function getClientAddress(bool $trustForwardedHeader = false): bool|string
     {
     }
 
@@ -209,7 +209,7 @@ public function getClientCharsets(): array
      *
      * @return string|null
      */
-    public function getContentType(): ?string
+    public function getContentType(): string|null
     {
     }
 
@@ -232,7 +232,7 @@ public function getDigestAuth(): array
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getFilteredQuery(string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getFilteredQuery(string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -245,7 +245,7 @@ public function getFilteredQuery(string $name = null, $defaultValue = null, bool
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getFilteredPatch(string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getFilteredPatch(string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -258,7 +258,7 @@ public function getFilteredPatch(string $name = null, $defaultValue = null, bool
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getFilteredPost(string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getFilteredPost(string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -271,7 +271,7 @@ public function getFilteredPost(string $name = null, $defaultValue = null, bool
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getFilteredPut(string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getFilteredPut(string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -360,7 +360,7 @@ public function getHTTPReferer(): string
      * @param bool $associative
      * @return array|bool|\stdClass
      */
-    public function getJsonRawBody(bool $associative = false)
+    public function getJsonRawBody(bool $associative = false): \stdClass|bool|array
     {
     }
 
@@ -409,7 +409,7 @@ final public function getMethod(): string
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getPatch(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getPatch(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -441,7 +441,7 @@ public function getPort(): int
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getPost(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getPost(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -463,7 +463,7 @@ public function getPost(string $name = null, $filters = null, $defaultValue = nu
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getPut(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getPut(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -489,7 +489,7 @@ public function getPut(string $name = null, $filters = null, $defaultValue = nul
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getQuery(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getQuery(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -517,7 +517,7 @@ public function getScheme(): string
      * @param string $name
      * @return string|null
      */
-    public function getServer(string $name): ?string
+    public function getServer(string $name): string|null
     {
     }
 
@@ -883,7 +883,7 @@ final protected function getBestQuality(array $qualityParts, string $name): stri
      * @param bool $noRecursive
      * @return mixed
      */
-    final protected function getHelper(array $source, string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    final protected function getHelper(array $source, string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -960,7 +960,7 @@ private function getServerArray(): array
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getFilteredData(string $methodKey, string $method, string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    public function getFilteredData(string $methodKey, string $method, string $name = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
@@ -983,7 +983,7 @@ public function getFilteredData(string $methodKey, string $method, string $name
      * @param bool $noRecursive
      * @return mixed
      */
-    private function getPatchPut(string $collection, string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false)
+    private function getPatchPut(string $collection, string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed
     {
     }
 
diff --git a/src/Http/Request/File.php b/src/Http/Request/File.php
index 138aa83f..06d23426 100644
--- a/src/Http/Request/File.php
+++ b/src/Http/Request/File.php
@@ -87,7 +87,7 @@ public function __construct(array $file, $key = null)
     /**
      * @return string|null
      */
-    public function getError(): ?string
+    public function getError(): string|null
     {
     }
 
@@ -101,7 +101,7 @@ public function getExtension(): string
     /**
      * @return string|null
      */
-    public function getKey(): ?string
+    public function getKey(): string|null
     {
     }
 
@@ -177,7 +177,7 @@ public function moveTo(string $destination): bool
      * @param mixed $defaultValue
      * @return mixed
      */
-    private function getArrVal(array $collection, $index, $defaultValue = null)
+    private function getArrVal(array $collection, $index, $defaultValue = null): mixed
     {
     }
 }
diff --git a/src/Http/Request/FileInterface.php b/src/Http/Request/FileInterface.php
index c380a1a9..51df3a2c 100644
--- a/src/Http/Request/FileInterface.php
+++ b/src/Http/Request/FileInterface.php
@@ -19,7 +19,7 @@ interface FileInterface
      *
      * @return string|null
      */
-    public function getError(): ?string;
+    public function getError(): string|null;
 
     /**
      * Returns the real name of the uploaded file
diff --git a/src/Http/RequestInterface.php b/src/Http/RequestInterface.php
index f26fe459..4b007fe8 100644
--- a/src/Http/RequestInterface.php
+++ b/src/Http/RequestInterface.php
@@ -36,7 +36,7 @@ interface RequestInterface
      * @param bool $noRecursive
      * @return mixed
      */
-    public function get(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false);
+    public function get(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed;
 
     /**
      * Gets an array with mime/types and their quality accepted by the
@@ -52,7 +52,7 @@ public function getAcceptableContent(): array;
      *
      * @return array|null
      */
-    public function getBasicAuth(): ?array;
+    public function getBasicAuth(): array|null;
 
     /**
      * Gets best mime/type accepted by the browser/client from
@@ -86,7 +86,7 @@ public function getBestLanguage(): string;
      * @param bool $trustForwardedHeader
      * @return string|bool
      */
-    public function getClientAddress(bool $trustForwardedHeader = false);
+    public function getClientAddress(bool $trustForwardedHeader = false): bool|string;
 
     /**
      * Gets a charsets array and their quality accepted by the browser/client
@@ -101,7 +101,7 @@ public function getClientCharsets(): array;
      *
      * @return string|null
      */
-    public function getContentType(): ?string;
+    public function getContentType(): string|null;
 
     /**
      * Gets auth info accepted by the browser/client from
@@ -188,7 +188,7 @@ public function getHTTPReferer(): string;
      * @param bool $associative
      * @return array|bool|stdClass
      */
-    public function getJsonRawBody(bool $associative = false);
+    public function getJsonRawBody(bool $associative = false): stdClass|bool|array;
 
     /**
      * Gets languages array and their quality accepted by the browser/client
@@ -255,7 +255,7 @@ public function getURI(bool $onlyPath = false): string;
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getPost(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false);
+    public function getPost(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed;
 
     /**
      * Gets a variable from put request
@@ -275,7 +275,7 @@ public function getPost(string $name = null, $filters = null, $defaultValue = nu
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getPut(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false);
+    public function getPut(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed;
 
     /**
      * Gets variable from $_GET superglobal applying filters if needed
@@ -299,7 +299,7 @@ public function getPut(string $name = null, $filters = null, $defaultValue = nul
      * @param bool $noRecursive
      * @return mixed
      */
-    public function getQuery(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false);
+    public function getQuery(string $name = null, $filters = null, $defaultValue = null, bool $notAllowEmpty = false, bool $noRecursive = false): mixed;
 
     /**
      * Gets HTTP raw request body
@@ -321,7 +321,7 @@ public function getScheme(): string;
      * @param string $name
      * @return string|null
      */
-    public function getServer(string $name): ?string;
+    public function getServer(string $name): string|null;
 
     /**
      * Gets active server address IP
diff --git a/src/Http/Response.php b/src/Http/Response.php
index 8d9113b7..63ad5bbf 100644
--- a/src/Http/Response.php
+++ b/src/Http/Response.php
@@ -139,7 +139,7 @@ public function getDI(): DiInterface
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -161,7 +161,7 @@ public function getHeaders(): HeadersInterface
      *
      * @return string|null
      */
-    public function getReasonPhrase(): ?string
+    public function getReasonPhrase(): string|null
     {
     }
 
@@ -174,7 +174,7 @@ public function getReasonPhrase(): ?string
      *
      * @return int|null
      */
-    public function getStatusCode(): ?int
+    public function getStatusCode(): int|null
     {
     }
 
@@ -275,7 +275,7 @@ public function sendCookies(): ResponseInterface
      *
      * @return bool|ResponseInterface
      */
-    public function sendHeaders()
+    public function sendHeaders(): ResponseInterface|bool
     {
     }
 
diff --git a/src/Http/Response/Headers.php b/src/Http/Response/Headers.php
index bfc24a82..46836a16 100644
--- a/src/Http/Response/Headers.php
+++ b/src/Http/Response/Headers.php
@@ -32,7 +32,7 @@ class Headers implements \Phalcon\Http\Response\HeadersInterface
      * @param string $name
      * @return string|bool
      */
-    public function get(string $name)
+    public function get(string $name): bool|string
     {
     }
 
diff --git a/src/Http/Response/HeadersInterface.php b/src/Http/Response/HeadersInterface.php
index 32948747..cb2c73ee 100644
--- a/src/Http/Response/HeadersInterface.php
+++ b/src/Http/Response/HeadersInterface.php
@@ -22,7 +22,7 @@ interface HeadersInterface
      * @param string $name
      * @return string|bool
      */
-    public function get(string $name);
+    public function get(string $name): bool|string;
 
     /**
      * Checks if a header exists
diff --git a/src/Http/ResponseInterface.php b/src/Http/ResponseInterface.php
index 137e7083..8aba7056 100644
--- a/src/Http/ResponseInterface.php
+++ b/src/Http/ResponseInterface.php
@@ -39,7 +39,7 @@ public function getContent(): string;
      *
      * @return int|null
      */
-    public function getStatusCode(): ?int;
+    public function getStatusCode(): int|null;
 
     /**
      * Returns headers set by the user
@@ -190,5 +190,5 @@ public function sendCookies(): ResponseInterface;
      *
      * @return bool|ResponseInterface
      */
-    public function sendHeaders();
+    public function sendHeaders(): ResponseInterface|bool;
 }
diff --git a/src/Image/ImageFactory.php b/src/Image/ImageFactory.php
index 01482b5e..386e6699 100644
--- a/src/Image/ImageFactory.php
+++ b/src/Image/ImageFactory.php
@@ -82,7 +82,7 @@ protected function getServices(): array
      * @param mixed $defaultValue
      * @return mixed
      */
-    private function getArrVal(array $collection, $index, $defaultValue = null)
+    private function getArrVal(array $collection, $index, $defaultValue = null): mixed
     {
     }
 }
diff --git a/src/Logger/LoggerFactory.php b/src/Logger/LoggerFactory.php
index 3a6ee3a3..ee90919c 100644
--- a/src/Logger/LoggerFactory.php
+++ b/src/Logger/LoggerFactory.php
@@ -73,7 +73,7 @@ public function newInstance(string $name, array $adapters = [], \DateTimeZone $t
      * @param mixed $defaultValue
      * @return mixed
      */
-    protected function getArrVal(array $collection, $index, $defaultValue = null)
+    protected function getArrVal(array $collection, $index, $defaultValue = null): mixed
     {
     }
 
diff --git a/src/Messages/Messages.php b/src/Messages/Messages.php
index 1c11c46e..74fe9686 100644
--- a/src/Messages/Messages.php
+++ b/src/Messages/Messages.php
@@ -155,7 +155,7 @@ public function offsetExists($index): bool
      * @param mixed $index
      * @return mixed
      */
-    public function offsetGet($index)
+    public function offsetGet($index): mixed
     {
     }
 
diff --git a/src/Mvc/Application.php b/src/Mvc/Application.php
index 8efa9900..46ab3e8e 100644
--- a/src/Mvc/Application.php
+++ b/src/Mvc/Application.php
@@ -87,7 +87,7 @@ class Application extends AbstractApplication
      * @param string $uri
      * @return bool|ResponseInterface
      */
-    public function handle(string $uri)
+    public function handle(string $uri): ResponseInterface|bool
     {
     }
 
diff --git a/src/Mvc/EntityInterface.php b/src/Mvc/EntityInterface.php
index 1acac67c..15439c29 100644
--- a/src/Mvc/EntityInterface.php
+++ b/src/Mvc/EntityInterface.php
@@ -22,7 +22,7 @@ interface EntityInterface
      * @param string $attribute
      * @return mixed|null
      */
-    public function readAttribute(string $attribute);
+    public function readAttribute(string $attribute): mixed;
 
     /**
      * Writes an attribute value by its name
diff --git a/src/Mvc/Micro.php b/src/Mvc/Micro.php
index 3bd057ea..77b3ff5f 100644
--- a/src/Mvc/Micro.php
+++ b/src/Mvc/Micro.php
@@ -230,7 +230,7 @@ public function getBoundModels(): array
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -258,7 +258,7 @@ public function getHandlers(): array
      *
      * @return BinderInterface|null
      */
-    public function getModelBinder(): ?BinderInterface
+    public function getModelBinder(): BinderInterface|null
     {
     }
 
@@ -387,7 +387,7 @@ public function offsetExists($offset): bool
      * @param mixed $offset
      * @return mixed
      */
-    public function offsetGet($offset)
+    public function offsetGet($offset): mixed
     {
     }
 
diff --git a/src/Mvc/Micro/Collection.php b/src/Mvc/Micro/Collection.php
index 1344e3fc..393f5c60 100644
--- a/src/Mvc/Micro/Collection.php
+++ b/src/Mvc/Micro/Collection.php
@@ -79,7 +79,7 @@ public function get(string $routePattern, $handler, string $name = null): Collec
      *
      * @return mixed
      */
-    public function getHandler()
+    public function getHandler(): mixed
     {
     }
 
diff --git a/src/Mvc/Micro/CollectionInterface.php b/src/Mvc/Micro/CollectionInterface.php
index d85c4575..dd5ca9e8 100644
--- a/src/Mvc/Micro/CollectionInterface.php
+++ b/src/Mvc/Micro/CollectionInterface.php
@@ -41,7 +41,7 @@ public function get(string $routePattern, $handler, string $name = null): Collec
      *
      * @return mixed
      */
-    public function getHandler();
+    public function getHandler(): mixed;
 
     /**
      * Returns the registered handlers
diff --git a/src/Mvc/Micro/LazyLoader.php b/src/Mvc/Micro/LazyLoader.php
index f28b691c..f56cef08 100644
--- a/src/Mvc/Micro/LazyLoader.php
+++ b/src/Mvc/Micro/LazyLoader.php
@@ -59,7 +59,7 @@ public function getDefinition(): string
     /**
      * @return object|null
      */
-    public function getHandler()
+    public function getHandler(): object|null
     {
     }
 }
diff --git a/src/Mvc/Model.php b/src/Mvc/Model.php
index 91958485..4874508b 100644
--- a/src/Mvc/Model.php
+++ b/src/Mvc/Model.php
@@ -414,7 +414,7 @@ public function assign(array $data, $whiteList = null, $dataColumnMap = null): M
      * @param array $parameters
      * @return float | ResultsetInterface
      */
-    public static function average(array $parameters = [])
+    public static function average(array $parameters = []): ResultsetInterface|float
     {
     }
 
@@ -510,7 +510,7 @@ protected function collectRelatedToSave(): array
      * @param array|string|null $parameters
      * @return int|ResultsetInterface
      */
-    public static function count($parameters = null)
+    public static function count($parameters = null): ResultsetInterface|int
     {
     }
 
@@ -854,7 +854,7 @@ public static function find($parameters = null)
      *
      * @return T|\Phalcon\Mvc\ModelInterface|\Phalcon\Mvc\Model\Row|null
      */
-    public static function findFirst($parameters = null)
+    public static function findFirst($parameters = null): mixed
     {
     }
 
@@ -915,7 +915,7 @@ public function getDirtyState(): int
      *
      * @return EventsManagerInterface|null
      */
-    public function getEventsManager(): ?EventsManagerInterface
+    public function getEventsManager(): EventsManagerInterface|null
     {
     }
 
@@ -1048,7 +1048,7 @@ public function isRelationshipLoaded(string $relationshipAlias): bool
      *
      * @return string|null
      */
-    final public function getSchema(): ?string
+    final public function getSchema(): string|null
     {
     }
 
@@ -1201,7 +1201,7 @@ public function jsonSerialize(): array
      * @param array $parameters
      * @return mixed
      */
-    public static function maximum($parameters = null)
+    public static function maximum($parameters = null): mixed
     {
     }
 
@@ -1233,7 +1233,7 @@ public static function maximum($parameters = null)
      * @param array $parameters
      * @return mixed
      */
-    public static function minimum($parameters = null)
+    public static function minimum($parameters = null): mixed
     {
     }
 
@@ -1257,7 +1257,7 @@ public static function query(\Phalcon\Di\DiInterface $container = null): Criteri
      * @param string $attribute
      * @return mixed|null
      */
-    public function readAttribute(string $attribute)
+    public function readAttribute(string $attribute): mixed
     {
     }
 
@@ -1315,7 +1315,7 @@ public function doSave(\Phalcon\Support\Collection\CollectionInterface $visited)
      *
      * @return string|null
      */
-    public function serialize(): ?string
+    public function serialize(): string|null
     {
     }
 
@@ -1345,7 +1345,7 @@ final public function setConnectionService(string $connectionService): void
      * @param int $dirtyState
      * @return bool|ModelInterface
      */
-    public function setDirtyState(int $dirtyState)
+    public function setDirtyState(int $dirtyState): ModelInterface|bool
     {
     }
 
@@ -1442,7 +1442,7 @@ public function setTransaction(\Phalcon\Mvc\Model\TransactionInterface $transact
     /**
      * @return TransactionInterface|null
      */
-    public function getTransaction(): ?TransactionInterface
+    public function getTransaction(): TransactionInterface|null
     {
     }
 
@@ -1504,7 +1504,7 @@ public function skipOperation(bool $skip): void
      * @param array $parameters
      * @return double | ResultsetInterface
      */
-    public static function sum($parameters = null)
+    public static function sum($parameters = null): ResultsetInterface|float
     {
     }
 
diff --git a/src/Mvc/Model/Binder.php b/src/Mvc/Model/Binder.php
index dcbe2880..d2a5cf54 100644
--- a/src/Mvc/Model/Binder.php
+++ b/src/Mvc/Model/Binder.php
@@ -80,7 +80,7 @@ public function bindToHandler($handler, array $params, string $cacheKey, string
      * @param mixed $paramValue
      * @param string $className
      */
-    protected function findBoundModel($paramValue, string $className)
+    protected function findBoundModel($paramValue, string $className): mixed
     {
     }
 
@@ -117,7 +117,7 @@ public function getCache(): AdapterInterface
      * @param string $cacheKey
      * @return array|null
      */
-    protected function getParamsFromCache(string $cacheKey): ?array
+    protected function getParamsFromCache(string $cacheKey): array|null
     {
     }
 
diff --git a/src/Mvc/Model/Binder/BindableInterface.php b/src/Mvc/Model/Binder/BindableInterface.php
index 9ce9cbb8..0e93da53 100644
--- a/src/Mvc/Model/Binder/BindableInterface.php
+++ b/src/Mvc/Model/Binder/BindableInterface.php
@@ -22,5 +22,5 @@ interface BindableInterface
      *
      * @return string|array
      */
-    public function getModelName();
+    public function getModelName(): string|array;
 }
diff --git a/src/Mvc/Model/Criteria.php b/src/Mvc/Model/Criteria.php
index 4e317105..4f2a81a8 100644
--- a/src/Mvc/Model/Criteria.php
+++ b/src/Mvc/Model/Criteria.php
@@ -247,7 +247,7 @@ public static function fromInput(\Phalcon\Di\DiInterface $container, string $mod
      *
      * @return string|array|null
      */
-    public function getColumns()
+    public function getColumns(): string|array|null
     {
     }
 
@@ -256,7 +256,7 @@ public function getColumns()
      *
      * @return string|null
      */
-    public function getConditions(): ?string
+    public function getConditions(): string|null
     {
     }
 
@@ -292,7 +292,7 @@ public function getHaving()
      *
      * @return int|array|null
      */
-    public function getLimit()
+    public function getLimit(): int|array|null
     {
     }
 
@@ -310,7 +310,7 @@ public function getModelName(): string
      *
      * @return string|null
      */
-    public function getOrderBy(): ?string
+    public function getOrderBy(): string|null
     {
     }
 
@@ -328,7 +328,7 @@ public function getParams(): array
      *
      * @return string|null
      */
-    public function getWhere(): ?string
+    public function getWhere(): string|null
     {
     }
 
diff --git a/src/Mvc/Model/CriteriaInterface.php b/src/Mvc/Model/CriteriaInterface.php
index 196c32fe..0a487b2a 100644
--- a/src/Mvc/Model/CriteriaInterface.php
+++ b/src/Mvc/Model/CriteriaInterface.php
@@ -105,14 +105,14 @@ public function forUpdate(bool $forUpdate = true): CriteriaInterface;
      *
      * @return string|array|null
      */
-    public function getColumns();
+    public function getColumns(): string|array|null;
 
     /**
      * Returns the conditions parameter in the criteria
      *
      * @return string|null
      */
-    public function getConditions(): ?string;
+    public function getConditions(): string|null;
 
     /**
      * Returns the group clause in the criteria
@@ -133,7 +133,7 @@ public function getHaving();
      *
      * @return int|array|null
      */
-    public function getLimit();
+    public function getLimit(): int|array|null;
 
     /**
      * Returns an internal model name on which the criteria will be applied
@@ -147,7 +147,7 @@ public function getModelName(): string;
      *
      * @return string|null
      */
-    public function getOrderBy(): ?string;
+    public function getOrderBy(): string|null;
 
     /**
      * Returns all the parameters defined in the criteria
@@ -161,7 +161,7 @@ public function getParams(): array;
      *
      * @return string|null
      */
-    public function getWhere(): ?string;
+    public function getWhere(): string|null;
 
     /**
      * Adds the group-by clause to the criteria
diff --git a/src/Mvc/Model/Manager.php b/src/Mvc/Model/Manager.php
index 796de7de..996f8422 100644
--- a/src/Mvc/Model/Manager.php
+++ b/src/Mvc/Model/Manager.php
@@ -378,7 +378,7 @@ public function createQuery(string $phql): QueryInterface
      *
      * @return ResultsetInterface|StatusInterface
      */
-    public function executeQuery(string $phql, $placeholders = null, $types = null)
+    public function executeQuery(string $phql, $placeholders = null, $types = null): mixed
     {
     }
 
@@ -470,7 +470,7 @@ public function getBelongsTo(\Phalcon\Mvc\ModelInterface $model): array
      *
      * @return ResultsetInterface | bool
      */
-    public function getBelongsToRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null)
+    public function getBelongsToRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null): ResultsetInterface|bool
     {
     }
 
@@ -479,7 +479,7 @@ public function getBelongsToRecords(string $modelName, string $modelRelation, \P
      *
      * @return BuilderInterface | null
      */
-    public function getBuilder(): ?BuilderInterface
+    public function getBuilder(): BuilderInterface|null
     {
     }
 
@@ -504,7 +504,7 @@ public function getConnectionService(\Phalcon\Mvc\ModelInterface $model, array $
      *
      * @return EventsManagerInterface | null
      */
-    public function getCustomEventsManager(\Phalcon\Mvc\ModelInterface $model): ?EventsManagerInterface
+    public function getCustomEventsManager(\Phalcon\Mvc\ModelInterface $model): EventsManagerInterface|null
     {
     }
 
@@ -522,7 +522,7 @@ public function getDI(): DiInterface
      *
      * @return EventsManagerInterface|null
      */
-    public function getEventsManager(): ?EventsManagerInterface
+    public function getEventsManager(): EventsManagerInterface|null
     {
     }
 
@@ -546,7 +546,7 @@ public function getHasMany(\Phalcon\Mvc\ModelInterface $model): array
      * @param string $method
      * @return bool|ResultsetInterface
      */
-    public function getHasManyRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null)
+    public function getHasManyRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null): ResultsetInterface|bool
     {
     }
 
@@ -590,7 +590,7 @@ public function getHasOneAndHasMany(\Phalcon\Mvc\ModelInterface $model): array
      * @param string $method
      * @return bool|ModelInterface
      */
-    public function getHasOneRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null)
+    public function getHasOneRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null): ModelInterface|bool
     {
     }
 
@@ -637,7 +637,7 @@ public function getModelPrefix(): string
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return string|null
      */
-    public function getModelSchema(\Phalcon\Mvc\ModelInterface $model): ?string
+    public function getModelSchema(\Phalcon\Mvc\ModelInterface $model): string|null
     {
     }
 
@@ -678,7 +678,7 @@ public function getReadConnectionService(\Phalcon\Mvc\ModelInterface $model): st
      * @param string $alias *
      * @return RelationInterface|bool
      */
-    public function getRelationByAlias(string $modelName, string $alias)
+    public function getRelationByAlias(string $modelName, string $alias): RelationInterface|bool
     {
     }
 
@@ -715,7 +715,7 @@ public function getRelations(string $modelName): array
      *
      * @return RelationInterface[] | bool
      */
-    public function getRelationsBetween(string $first, string $second)
+    public function getRelationsBetween(string $first, string $second): bool|array
     {
     }
 
diff --git a/src/Mvc/Model/ManagerInterface.php b/src/Mvc/Model/ManagerInterface.php
index a77aa767..35422717 100644
--- a/src/Mvc/Model/ManagerInterface.php
+++ b/src/Mvc/Model/ManagerInterface.php
@@ -120,7 +120,7 @@ public function createQuery(string $phql): QueryInterface;
      * @return ResultsetInterface|StatusInterface
      * @param string $phql
      */
-    public function executeQuery(string $phql, $placeholders = null, $types = null);
+    public function executeQuery(string $phql, $placeholders = null, $types = null): mixed;
 
     /**
      * Gets belongsTo relations defined on a model
@@ -140,14 +140,14 @@ public function getBelongsTo(\Phalcon\Mvc\ModelInterface $model): array;
      * @param string|null       $method
      * @return bool|ResultsetInterface
      */
-    public function getBelongsToRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null);
+    public function getBelongsToRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null): ResultsetInterface|bool;
 
     /**
      * Returns the newly created Phalcon\Mvc\Model\Query\Builder or null
      *
      * @return BuilderInterface|null
      */
-    public function getBuilder(): ?BuilderInterface;
+    public function getBuilder(): BuilderInterface|null;
 
     /**
      * Gets hasMany relations defined on a model
@@ -167,7 +167,7 @@ public function getHasMany(\Phalcon\Mvc\ModelInterface $model): array;
      * @param string|null       $method
      * @return bool|ResultsetInterface
      */
-    public function getHasManyRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null);
+    public function getHasManyRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null): ResultsetInterface|bool;
 
     /**
      * Gets hasManyToMany relations defined on a model
@@ -211,7 +211,7 @@ public function getHasOneAndHasMany(\Phalcon\Mvc\ModelInterface $model): array;
      * @param string|null       $method
      * @return bool|ModelInterface
      */
-    public function getHasOneRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null);
+    public function getHasOneRecords(string $modelName, string $modelRelation, \Phalcon\Mvc\ModelInterface $record, $parameters = null, string $method = null): ModelInterface|bool;
 
     /**
      * Get last initialized model
@@ -233,7 +233,7 @@ public function getLastQuery(): QueryInterface;
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return string|null
      */
-    public function getModelSchema(\Phalcon\Mvc\ModelInterface $model): ?string;
+    public function getModelSchema(\Phalcon\Mvc\ModelInterface $model): string|null;
 
     /**
      * Returns the mapped source for a model
@@ -266,7 +266,7 @@ public function getReadConnectionService(\Phalcon\Mvc\ModelInterface $model): st
      * @param string $alias *
      * @return RelationInterface|bool
      */
-    public function getRelationByAlias(string $modelName, string $alias);
+    public function getRelationByAlias(string $modelName, string $alias): RelationInterface|bool;
 
     /**
      * Helper method to query records based on a relation definition
@@ -294,7 +294,7 @@ public function getRelations(string $modelName): array;
      * @param string $second
      * @return array|bool|RelationInterface[]
      */
-    public function getRelationsBetween(string $first, string $second);
+    public function getRelationsBetween(string $first, string $second): bool|array;
 
     /**
      * Returns the connection to write data related to a model
diff --git a/src/Mvc/Model/MetaData.php b/src/Mvc/Model/MetaData.php
index adb32a24..b7f1b78f 100644
--- a/src/Mvc/Model/MetaData.php
+++ b/src/Mvc/Model/MetaData.php
@@ -100,7 +100,7 @@ abstract class MetaData implements \Phalcon\Di\InjectionAwareInterface, \Phalcon
      *
      * @return CacheAdapterInterface|null
      */
-    public function getAdapter(): ?CacheAdapterInterface
+    public function getAdapter(): CacheAdapterInterface|null
     {
     }
 
@@ -190,7 +190,7 @@ public function getBindTypes(\Phalcon\Mvc\ModelInterface $model): array
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return array|null
      */
-    public function getColumnMap(\Phalcon\Mvc\ModelInterface $model): ?array
+    public function getColumnMap(\Phalcon\Mvc\ModelInterface $model): array|null
     {
     }
 
@@ -289,7 +289,7 @@ public function getEmptyStringAttributes(\Phalcon\Mvc\ModelInterface $model): ar
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return string|null
      */
-    public function getIdentityField(\Phalcon\Mvc\ModelInterface $model): ?string
+    public function getIdentityField(\Phalcon\Mvc\ModelInterface $model): string|null
     {
     }
 
@@ -361,7 +361,7 @@ public function getPrimaryKeyAttributes(\Phalcon\Mvc\ModelInterface $model): arr
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return array|null
      */
-    public function getReverseColumnMap(\Phalcon\Mvc\ModelInterface $model): ?array
+    public function getReverseColumnMap(\Phalcon\Mvc\ModelInterface $model): array|null
     {
     }
 
@@ -415,7 +415,7 @@ public function isEmpty(): bool
      * @param string $key
      * @return array|null
      */
-    public function read(string $key): ?array
+    public function read(string $key): array|null
     {
     }
 
@@ -433,7 +433,7 @@ public function read(string $key): ?array
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return array|null
      */
-    final public function readColumnMap(\Phalcon\Mvc\ModelInterface $model): ?array
+    final public function readColumnMap(\Phalcon\Mvc\ModelInterface $model): array|null
     {
     }
 
@@ -453,7 +453,7 @@ final public function readColumnMap(\Phalcon\Mvc\ModelInterface $model): ?array
      * @param int $index
      * @return array|null
      */
-    final public function readColumnMapIndex(\Phalcon\Mvc\ModelInterface $model, int $index): ?array
+    final public function readColumnMapIndex(\Phalcon\Mvc\ModelInterface $model, int $index): array|null
     {
     }
 
@@ -471,7 +471,7 @@ final public function readColumnMapIndex(\Phalcon\Mvc\ModelInterface $model, int
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return array|null
      */
-    final public function readMetaData(\Phalcon\Mvc\ModelInterface $model): ?array
+    final public function readMetaData(\Phalcon\Mvc\ModelInterface $model): array|null
     {
     }
 
@@ -491,7 +491,7 @@ final public function readMetaData(\Phalcon\Mvc\ModelInterface $model): ?array
      * @param int $index
      * @return array|null
      */
-    final public function readMetaDataIndex(\Phalcon\Mvc\ModelInterface $model, int $index): ?array
+    final public function readMetaDataIndex(\Phalcon\Mvc\ModelInterface $model, int $index): array|null
     {
     }
 
@@ -674,7 +674,7 @@ private function throwWriteException($option): void
      * @param mixed $defaultValue
      * @return mixed
      */
-    protected function getArrVal(array $collection, $index, $defaultValue = null)
+    protected function getArrVal(array $collection, $index, $defaultValue = null): mixed
     {
     }
 
@@ -684,7 +684,7 @@ protected function getArrVal(array $collection, $index, $defaultValue = null)
      * @return string
      * @param \Phalcon\Mvc\ModelInterface $model
      */
-    final public function getMetaDataUniqueKey(\Phalcon\Mvc\ModelInterface $model): ?string
+    final public function getMetaDataUniqueKey(\Phalcon\Mvc\ModelInterface $model): string|null
     {
     }
 
@@ -694,7 +694,7 @@ final public function getMetaDataUniqueKey(\Phalcon\Mvc\ModelInterface $model):
      * @return string
      * @param \Phalcon\Mvc\ModelInterface $model
      */
-    final public function getColumnMapUniqueKey(\Phalcon\Mvc\ModelInterface $model): ?string
+    final public function getColumnMapUniqueKey(\Phalcon\Mvc\ModelInterface $model): string|null
     {
     }
 }
diff --git a/src/Mvc/Model/MetaData/Memory.php b/src/Mvc/Model/MetaData/Memory.php
index d96e6081..a67c3b74 100644
--- a/src/Mvc/Model/MetaData/Memory.php
+++ b/src/Mvc/Model/MetaData/Memory.php
@@ -34,7 +34,7 @@ public function __construct($options = null)
      * @param string $key
      * @return array|null
      */
-    public function read(string $key): ?array
+    public function read(string $key): array|null
     {
     }
 
diff --git a/src/Mvc/Model/MetaData/Stream.php b/src/Mvc/Model/MetaData/Stream.php
index 724f130c..d87ed956 100644
--- a/src/Mvc/Model/MetaData/Stream.php
+++ b/src/Mvc/Model/MetaData/Stream.php
@@ -47,7 +47,7 @@ public function __construct(array $options = [])
      * @param string $key
      * @return array|null
      */
-    public function read(string $key): ?array
+    public function read(string $key): array|null
     {
     }
 
diff --git a/src/Mvc/Model/MetaDataInterface.php b/src/Mvc/Model/MetaDataInterface.php
index 6fed1245..2a15ee59 100644
--- a/src/Mvc/Model/MetaDataInterface.php
+++ b/src/Mvc/Model/MetaDataInterface.php
@@ -57,7 +57,7 @@ public function getBindTypes(\Phalcon\Mvc\ModelInterface $model): array;
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return array|null
      */
-    public function getColumnMap(\Phalcon\Mvc\ModelInterface $model): ?array;
+    public function getColumnMap(\Phalcon\Mvc\ModelInterface $model): array|null;
 
     /**
      * Returns attributes (which have default values) and their default values
@@ -97,7 +97,7 @@ public function getEmptyStringAttributes(\Phalcon\Mvc\ModelInterface $model): ar
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return string|null
      */
-    public function getIdentityField(\Phalcon\Mvc\ModelInterface $model): ?string;
+    public function getIdentityField(\Phalcon\Mvc\ModelInterface $model): string|null;
 
     /**
      * Returns an array of fields which are not part of the primary key
@@ -129,7 +129,7 @@ public function getPrimaryKeyAttributes(\Phalcon\Mvc\ModelInterface $model): arr
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return array|null
      */
-    public function getReverseColumnMap(\Phalcon\Mvc\ModelInterface $model): ?array;
+    public function getReverseColumnMap(\Phalcon\Mvc\ModelInterface $model): array|null;
 
     /**
      * Return the strategy to obtain the meta-data
@@ -160,7 +160,7 @@ public function isEmpty(): bool;
      * @param string $key
      * @return array|null
      */
-    public function read(string $key): ?array;
+    public function read(string $key): array|null;
 
     /**
      * Reads the ordered/reversed column map for certain model
@@ -168,7 +168,7 @@ public function read(string $key): ?array;
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return array|null
      */
-    public function readColumnMap(\Phalcon\Mvc\ModelInterface $model): ?array;
+    public function readColumnMap(\Phalcon\Mvc\ModelInterface $model): array|null;
 
     /**
      * Reads column-map information for certain model using a MODEL_ constant
@@ -177,7 +177,7 @@ public function readColumnMap(\Phalcon\Mvc\ModelInterface $model): ?array;
      * @param int $index
      * @return array|null
      */
-    public function readColumnMapIndex(\Phalcon\Mvc\ModelInterface $model, int $index): ?array;
+    public function readColumnMapIndex(\Phalcon\Mvc\ModelInterface $model, int $index): array|null;
 
     /**
      * Reads meta-data for certain model
@@ -185,7 +185,7 @@ public function readColumnMapIndex(\Phalcon\Mvc\ModelInterface $model, int $inde
      * @param \Phalcon\Mvc\ModelInterface $model
      * @return array|null
      */
-    public function readMetaData(\Phalcon\Mvc\ModelInterface $model): ?array;
+    public function readMetaData(\Phalcon\Mvc\ModelInterface $model): array|null;
 
     /**
      * Reads meta-data for certain model using a MODEL_ constant
@@ -194,7 +194,7 @@ public function readMetaData(\Phalcon\Mvc\ModelInterface $model): ?array;
      * @param int $index
      * @return array|null
      */
-    public function readMetaDataIndex(\Phalcon\Mvc\ModelInterface $model, int $index): ?array;
+    public function readMetaDataIndex(\Phalcon\Mvc\ModelInterface $model, int $index): array|null;
 
     /**
      * Resets internal meta-data in order to regenerate it
diff --git a/src/Mvc/Model/Query.php b/src/Mvc/Model/Query.php
index 7556b344..4ade28e8 100644
--- a/src/Mvc/Model/Query.php
+++ b/src/Mvc/Model/Query.php
@@ -348,7 +348,7 @@ public function getUniqueRow(): bool
     /**
      * @return TransactionInterface|null
      */
-    public function getTransaction(): ?TransactionInterface
+    public function getTransaction(): TransactionInterface|null
     {
     }
 
@@ -482,7 +482,7 @@ final protected function executeInsert(array $intermediate, array $bindParams, a
      * @param bool $simulate
      * @return array|ResultsetInterface
      */
-    final protected function executeSelect(array $intermediate, array $bindParams, array $bindTypes, bool $simulate = false)
+    final protected function executeSelect(array $intermediate, array $bindParams, array $bindTypes, bool $simulate = false): ResultsetInterface|array
     {
     }
 
diff --git a/src/Mvc/Model/Query/Builder.php b/src/Mvc/Model/Query/Builder.php
index 2ffb8e32..ba9d2749 100644
--- a/src/Mvc/Model/Query/Builder.php
+++ b/src/Mvc/Model/Query/Builder.php
@@ -465,7 +465,7 @@ public function getLimit()
      *
      * @return string|array|null
      */
-    public function getModels()
+    public function getModels(): string|array|null
     {
     }
 
diff --git a/src/Mvc/Model/Query/BuilderInterface.php b/src/Mvc/Model/Query/BuilderInterface.php
index 4265dbbc..084a436d 100644
--- a/src/Mvc/Model/Query/BuilderInterface.php
+++ b/src/Mvc/Model/Query/BuilderInterface.php
@@ -305,7 +305,7 @@ public function limit(int $limit, $offset = null): BuilderInterface;
      *
      * @return string|array|null
      */
-    public function getModels();
+    public function getModels(): string|array|null;
 
     /**
      * Appends a NOT BETWEEN condition to the current conditions
diff --git a/src/Mvc/Model/ResultInterface.php b/src/Mvc/Model/ResultInterface.php
index 2cbe045e..fc38462d 100644
--- a/src/Mvc/Model/ResultInterface.php
+++ b/src/Mvc/Model/ResultInterface.php
@@ -24,5 +24,5 @@ interface ResultInterface
      * @param int $dirtyState
      * @return bool|ModelInterface
      */
-    public function setDirtyState(int $dirtyState);
+    public function setDirtyState(int $dirtyState): ModelInterface|bool;
 }
diff --git a/src/Mvc/Model/Resultset.php b/src/Mvc/Model/Resultset.php
index 3dc05e16..c7395f9b 100644
--- a/src/Mvc/Model/Resultset.php
+++ b/src/Mvc/Model/Resultset.php
@@ -186,7 +186,7 @@ public function filter($filter): array
      *
      * @return CacheInterface|null
      */
-    public function getCache(): ?CacheInterface
+    public function getCache(): CacheInterface|null
     {
     }
 
@@ -215,7 +215,7 @@ public function getCache(): ?CacheInterface
      *
      * @return ModelInterface|Row|null
      */
-    public function getFirst()
+    public function getFirst(): mixed
     {
     }
 
@@ -233,7 +233,7 @@ public function getHydrateMode(): int
      *
      * @return ModelInterface|null
      */
-    public function getLast(): ?ModelInterface
+    public function getLast(): ModelInterface|null
     {
     }
 
@@ -285,7 +285,7 @@ public function jsonSerialize(): array
      *
      * @return TKey|null
      */
-    public function key(): ?int
+    public function key(): int|null
     {
     }
 
@@ -304,7 +304,7 @@ public function next(): void
      * @param mixed $index
      * @return mixed
      */
-    public function offsetGet($index)
+    public function offsetGet($index): mixed
     {
     }
 
diff --git a/src/Mvc/Model/Resultset/Complex.php b/src/Mvc/Model/Resultset/Complex.php
index adaf9304..dd214e36 100644
--- a/src/Mvc/Model/Resultset/Complex.php
+++ b/src/Mvc/Model/Resultset/Complex.php
@@ -61,7 +61,7 @@ public function __construct($columnTypes, \Phalcon\Db\ResultInterface $result =
      *
      * @return mixed
      */
-    final public function current()
+    final public function current(): mixed
     {
     }
 
diff --git a/src/Mvc/Model/Resultset/Simple.php b/src/Mvc/Model/Resultset/Simple.php
index a6a6bc0e..07896a1f 100644
--- a/src/Mvc/Model/Resultset/Simple.php
+++ b/src/Mvc/Model/Resultset/Simple.php
@@ -62,7 +62,7 @@ public function __construct($columnMap, $model, $result, $cache = null, bool $ke
      *
      * @return TValue
      */
-    final public function current(): ?ModelInterface
+    final public function current(): ModelInterface|null
     {
     }
 
diff --git a/src/Mvc/Model/ResultsetInterface.php b/src/Mvc/Model/ResultsetInterface.php
index 8477d9a4..1c12957e 100644
--- a/src/Mvc/Model/ResultsetInterface.php
+++ b/src/Mvc/Model/ResultsetInterface.php
@@ -51,14 +51,14 @@ public function filter($filter): array;
      *
      * @return mixed|null
      */
-    public function getCache();
+    public function getCache(): mixed;
 
     /**
      * Get first row in the resultset
      *
      * @return ModelInterface|Row|null
      */
-    public function getFirst();
+    public function getFirst(): mixed;
 
     /**
      * Returns the current hydration mode
@@ -72,7 +72,7 @@ public function getHydrateMode(): int;
      *
      * @return ModelInterface|null
      */
-    public function getLast(): ?ModelInterface;
+    public function getLast(): ModelInterface|null;
 
     /**
      * Returns the error messages produced by a batch operation
diff --git a/src/Mvc/Model/Row.php b/src/Mvc/Model/Row.php
index c07f245c..0bb3dd44 100644
--- a/src/Mvc/Model/Row.php
+++ b/src/Mvc/Model/Row.php
@@ -35,7 +35,7 @@ public function jsonSerialize(): array
      * @param string|int $index *
      * @return string|ModelInterface
      */
-    public function offsetGet($index)
+    public function offsetGet($index): mixed
     {
     }
 
@@ -91,7 +91,7 @@ public function readAttribute(string $attribute)
      * @param int $dirtyState
      * @return bool|ModelInterface
      */
-    public function setDirtyState(int $dirtyState)
+    public function setDirtyState(int $dirtyState): ModelInterface|bool
     {
     }
 
diff --git a/src/Mvc/ModelInterface.php b/src/Mvc/ModelInterface.php
index 5ba5907f..d434196d 100644
--- a/src/Mvc/ModelInterface.php
+++ b/src/Mvc/ModelInterface.php
@@ -53,7 +53,7 @@ public function assign(array $data, $whiteList = null, $dataColumnMap = null): M
      * @param array $parameters
      * @return ResultsetInterface|float
      */
-    public static function average(array $parameters = []);
+    public static function average(array $parameters = []): ResultsetInterface|float;
 
     /**
      * Assigns values to a model from an array returning a new model
@@ -96,7 +96,7 @@ public static function cloneResultMapHydrate(array $data, $columnMap, int $hydra
      * @param array|string|null $parameters
      * @return int|ResultsetInterface
      */
-    public static function count($parameters = null);
+    public static function count($parameters = null): ResultsetInterface|int;
 
     /**
      * Inserts a model instance. If the instance already exists in the
@@ -132,7 +132,7 @@ public static function find($parameters = null);
      * @see https://github.com/phalcon/cphalcon/issues/15212
      * @see https://github.com/phalcon/cphalcon/issues/15883
      */
-    public static function findFirst($parameters = null);
+    public static function findFirst($parameters = null): mixed;
 
     /**
      * Fires an event, implicitly calls behaviors and listeners in the events
@@ -211,7 +211,7 @@ public function getRelated(string $alias, $arguments = null);
      *
      * @return string|null
      */
-    public function getSchema(): ?string;
+    public function getSchema(): string|null;
 
     /**
      * Returns table name mapped in the model
@@ -241,7 +241,7 @@ public function getWriteConnectionService(): string;
      * @param array $parameters
      * @return mixed
      */
-    public static function maximum($parameters = null);
+    public static function maximum($parameters = null): mixed;
 
     /**
      * Allows to get the minimum value of a column that match the specified
@@ -250,7 +250,7 @@ public static function maximum($parameters = null);
      * @param array $parameters
      * @return mixed
      */
-    public static function minimum($parameters = null);
+    public static function minimum($parameters = null): mixed;
 
     /**
      * Create a criteria for a specific model
@@ -290,7 +290,7 @@ public function setConnectionService(string $connectionService): void;
      * @param int $dirtyState
      * @return bool|ModelInterface
      */
-    public function setDirtyState(int $dirtyState);
+    public function setDirtyState(int $dirtyState): ModelInterface|bool;
 
     /**
      * Sets the DependencyInjection connection service used to read data
@@ -340,7 +340,7 @@ public function skipOperation(bool $skip): void;
      * @param array $parameters
      * @return float|ResultsetInterface
      */
-    public static function sum($parameters = null);
+    public static function sum($parameters = null): ResultsetInterface|float;
 
     /**
      * Check whether validation process has generated any messages
diff --git a/src/Mvc/Router.php b/src/Mvc/Router.php
index dc88de03..ce73a120 100644
--- a/src/Mvc/Router.php
+++ b/src/Mvc/Router.php
@@ -408,7 +408,7 @@ public function clear(): void
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -458,7 +458,7 @@ public function getKeyRouteIds(): array
      *
      * @return RouteInterface|null
      */
-    public function getMatchedRoute(): ?RouteInterface
+    public function getMatchedRoute(): RouteInterface|null
     {
     }
 
@@ -504,7 +504,7 @@ public function getParams(): array
      * @param mixed $id *
      * @return RouteInterface|bool
      */
-    public function getRouteById($id)
+    public function getRouteById($id): RouteInterface|bool
     {
     }
 
@@ -514,7 +514,7 @@ public function getRouteById($id)
      * @param string $name *
      * @return RouteInterface|bool
      */
-    public function getRouteByName(string $name)
+    public function getRouteByName(string $name): RouteInterface|bool
     {
     }
 
diff --git a/src/Mvc/Router/Group.php b/src/Mvc/Router/Group.php
index 030ab2a4..6d0a96ee 100644
--- a/src/Mvc/Router/Group.php
+++ b/src/Mvc/Router/Group.php
@@ -324,7 +324,7 @@ public function getBeforeMatch()
      *
      * @return string|null
      */
-    public function getHostname(): ?string
+    public function getHostname(): string|null
     {
     }
 
@@ -333,7 +333,7 @@ public function getHostname(): ?string
      *
      * @return array|string
      */
-    public function getPaths()
+    public function getPaths(): string|array
     {
     }
 
diff --git a/src/Mvc/Router/GroupInterface.php b/src/Mvc/Router/GroupInterface.php
index 884080e8..ce64b939 100644
--- a/src/Mvc/Router/GroupInterface.php
+++ b/src/Mvc/Router/GroupInterface.php
@@ -190,14 +190,14 @@ public function getBeforeMatch();
      *
      * @return string|null
      */
-    public function getHostname(): ?string;
+    public function getHostname(): string|null;
 
     /**
      * Returns the common paths defined for this group
      *
      * @return array|string
      */
-    public function getPaths();
+    public function getPaths(): string|array;
 
     /**
      * Returns the common prefix for all the routes
diff --git a/src/Mvc/Router/Route.php b/src/Mvc/Router/Route.php
index a69e64e6..09052eba 100644
--- a/src/Mvc/Router/Route.php
+++ b/src/Mvc/Router/Route.php
@@ -145,7 +145,7 @@ public function convert(string $name, $converter): RouteInterface
      * @param string $pattern
      * @return array|bool
      */
-    public function extractNamedParams(string $pattern)
+    public function extractNamedParams(string $pattern): bool|array
     {
     }
 
@@ -181,7 +181,7 @@ public function getConverters(): array
      *
      * @return GroupInterface|null
      */
-    public function getGroup(): ?GroupInterface
+    public function getGroup(): GroupInterface|null
     {
     }
 
@@ -190,7 +190,7 @@ public function getGroup(): ?GroupInterface
      *
      * @return array|string
      */
-    public function getHttpMethods()
+    public function getHttpMethods(): string|array
     {
     }
 
@@ -199,7 +199,7 @@ public function getHttpMethods()
      *
      * @return string|null
      */
-    public function getHostname(): ?string
+    public function getHostname(): string|null
     {
     }
 
@@ -224,7 +224,7 @@ public function getMatch()
      *
      * @return string|null
      */
-    public function getName(): ?string
+    public function getName(): string|null
     {
     }
 
diff --git a/src/Mvc/Router/RouteInterface.php b/src/Mvc/Router/RouteInterface.php
index e759ac83..c86190f7 100644
--- a/src/Mvc/Router/RouteInterface.php
+++ b/src/Mvc/Router/RouteInterface.php
@@ -45,21 +45,21 @@ public function getCompiledPattern(): string;
      *
      * @return string|null
      */
-    public function getHostname(): ?string;
+    public function getHostname(): string|null;
 
     /**
      * Returns the HTTP methods that constraint matching the route
      *
      * @return string|array
      */
-    public function getHttpMethods();
+    public function getHttpMethods(): string|array;
 
     /**
      * Returns the route's name
      *
      * @return string|null
      */
-    public function getName(): ?string;
+    public function getName(): string|null;
 
     /**
      * Returns the paths
diff --git a/src/Mvc/RouterInterface.php b/src/Mvc/RouterInterface.php
index bb1b0088..d6a55925 100644
--- a/src/Mvc/RouterInterface.php
+++ b/src/Mvc/RouterInterface.php
@@ -164,7 +164,7 @@ public function getControllerName(): string;
      *
      * @return RouteInterface|null
      */
-    public function getMatchedRoute(): ?RouteInterface;
+    public function getMatchedRoute(): RouteInterface|null;
 
     /**
      * Return the sub expressions in the regular expression matched
@@ -207,7 +207,7 @@ public function getRoutes(): array;
      * @return RouteInterface|bool
      * @param mixed $id
      */
-    public function getRouteById($id);
+    public function getRouteById($id): RouteInterface|bool;
 
     /**
      * Returns a route object by its name
@@ -215,7 +215,7 @@ public function getRouteById($id);
      * @return RouteInterface|bool
      * @param string $name
      */
-    public function getRouteByName(string $name);
+    public function getRouteByName(string $name): RouteInterface|bool;
 
     /**
      * Handles routing information received from the rewrite engine
diff --git a/src/Mvc/View.php b/src/Mvc/View.php
index 99f0bd3c..b28624df 100644
--- a/src/Mvc/View.php
+++ b/src/Mvc/View.php
@@ -209,7 +209,7 @@ public function __construct(array $options = [])
      * @param string $key
      * @return mixed|null
      */
-    public function __get(string $key)
+    public function __get(string $key): mixed
     {
     }
 
@@ -328,7 +328,7 @@ public function getActionName(): string
      *
      * @return string|array
      */
-    public function getActiveRenderPath()
+    public function getActiveRenderPath(): string|array
     {
     }
 
@@ -385,7 +385,7 @@ public function getRenderLevel(): int
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -489,7 +489,7 @@ public function getRender(string $controllerName, string $actionName, array $par
      * @return mixed|null
      * @param string $key
      */
-    public function getVar(string $key)
+    public function getVar(string $key): mixed
     {
     }
 
@@ -498,7 +498,7 @@ public function getVar(string $key)
      *
      * @return string|array
      */
-    public function getViewsDir()
+    public function getViewsDir(): string|array
     {
     }
 
@@ -613,7 +613,7 @@ public function registerEngines(array $engines): View
      * @param array $params
      * @return bool|View
      */
-    public function render(string $controllerName, string $actionName, array $params = [])
+    public function render(string $controllerName, string $actionName, array $params = []): View|bool
     {
     }
 
diff --git a/src/Mvc/View/Engine/Volt.php b/src/Mvc/View/Engine/Volt.php
index 8e75c451..dd16dd12 100644
--- a/src/Mvc/View/Engine/Volt.php
+++ b/src/Mvc/View/Engine/Volt.php
@@ -52,7 +52,7 @@ class Volt extends \Phalcon\Mvc\View\Engine\AbstractEngine implements \Phalcon\E
      * @param string $name
      * @param array $arguments
      */
-    public function callMacro(string $name, array $arguments = [])
+    public function callMacro(string $name, array $arguments = []): mixed
     {
     }
 
@@ -82,7 +82,7 @@ public function getCompiler(): Compiler
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
diff --git a/src/Mvc/View/Engine/Volt/Compiler.php b/src/Mvc/View/Engine/Volt/Compiler.php
index 0076ede9..66aecbbd 100644
--- a/src/Mvc/View/Engine/Volt/Compiler.php
+++ b/src/Mvc/View/Engine/Volt/Compiler.php
@@ -531,7 +531,7 @@ public function getFunctions(): array
      * @param string $option *
      * @return string|null
      */
-    public function getOption(string $option): ?string
+    public function getOption(string $option): string|null
     {
     }
 
@@ -636,7 +636,7 @@ public function setUniquePrefix(string $prefix): Compiler
      * @param bool $extendsMode
      * @return array|string
      */
-    protected function compileSource(string $viewCode, bool $extendsMode = false)
+    protected function compileSource(string $viewCode, bool $extendsMode = false): string|array
     {
     }
 
diff --git a/src/Mvc/View/Simple.php b/src/Mvc/View/Simple.php
index b1d8c9c9..87c3ce26 100644
--- a/src/Mvc/View/Simple.php
+++ b/src/Mvc/View/Simple.php
@@ -106,7 +106,7 @@ public function __construct(array $options = [])
      * @return mixed|null
      * @param string $key
      */
-    public function __get(string $key)
+    public function __get(string $key): mixed
     {
     }
 
@@ -148,7 +148,7 @@ public function getContent(): string
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
@@ -174,7 +174,7 @@ public function getRegisteredEngines(): array
      * @return mixed|null
      * @param string $key
      */
-    public function getVar(string $key)
+    public function getVar(string $key): mixed
     {
     }
 
diff --git a/src/Mvc/ViewBaseInterface.php b/src/Mvc/ViewBaseInterface.php
index becc5b16..ddb5a697 100644
--- a/src/Mvc/ViewBaseInterface.php
+++ b/src/Mvc/ViewBaseInterface.php
@@ -37,7 +37,7 @@ public function getParamsToView(): array;
      *
      * @return string|array
      */
-    public function getViewsDir();
+    public function getViewsDir(): string|array;
 
     /**
      * Renders a partial view
diff --git a/src/Mvc/ViewInterface.php b/src/Mvc/ViewInterface.php
index 6e6caea1..735b6a30 100644
--- a/src/Mvc/ViewInterface.php
+++ b/src/Mvc/ViewInterface.php
@@ -53,7 +53,7 @@ public function getActionName(): string;
      *
      * @return string|array
      */
-    public function getActiveRenderPath();
+    public function getActiveRenderPath(): string|array;
 
     /**
      * Gets base path
@@ -126,7 +126,7 @@ public function registerEngines(array $engines);
      * @param array $params
      * @return bool|ViewInterface
      */
-    public function render(string $controllerName, string $actionName, array $params = []);
+    public function render(string $controllerName, string $actionName, array $params = []): ViewInterface|bool;
 
     /**
      * Resets the view component to its factory default values
diff --git a/src/Paginator/Repository.php b/src/Paginator/Repository.php
index ffa6ab77..a24211cb 100644
--- a/src/Paginator/Repository.php
+++ b/src/Paginator/Repository.php
@@ -34,7 +34,7 @@ class Repository implements \Phalcon\Paginator\RepositoryInterface, \JsonSeriali
      * @param string $property
      * @return mixed|null
      */
-    public function __get(string $property)
+    public function __get(string $property): mixed
     {
     }
 
@@ -70,7 +70,7 @@ public function getFirst(): int
      *
      * @return mixed
      */
-    public function getItems()
+    public function getItems(): mixed
     {
     }
 
@@ -155,7 +155,7 @@ public function setProperties(array $properties): RepositoryInterface
      * @param mixed $defaultValue
      * @return mixed
      */
-    protected function getProperty(string $property, $defaultValue = null)
+    protected function getProperty(string $property, $defaultValue = null): mixed
     {
     }
 
diff --git a/src/Paginator/RepositoryInterface.php b/src/Paginator/RepositoryInterface.php
index 05c23ed4..c7ddb582 100644
--- a/src/Paginator/RepositoryInterface.php
+++ b/src/Paginator/RepositoryInterface.php
@@ -60,7 +60,7 @@ public function getFirst(): int;
      *
      * @return mixed
      */
-    public function getItems();
+    public function getItems(): mixed;
 
     /**
      * Gets number of the last page
diff --git a/src/Session/Adapter/AbstractAdapter.php b/src/Session/Adapter/AbstractAdapter.php
index 9b362972..8ae9425b 100644
--- a/src/Session/Adapter/AbstractAdapter.php
+++ b/src/Session/Adapter/AbstractAdapter.php
@@ -52,7 +52,7 @@ public function destroy($id): bool
      * @param int $max_lifetime
      * @return false|int
      */
-    public function gc(int $max_lifetime): int
+    public function gc(int $max_lifetime): int|false
     {
     }
 
@@ -95,7 +95,7 @@ public function write($id, $data): bool
      * @param mixed $defaultValue
      * @return mixed
      */
-    protected function getArrVal(array $collection, $index, $defaultValue = null)
+    protected function getArrVal(array $collection, $index, $defaultValue = null): mixed
     {
     }
 }
diff --git a/src/Session/Adapter/Noop.php b/src/Session/Adapter/Noop.php
index c1785aee..3ab1ccd5 100644
--- a/src/Session/Adapter/Noop.php
+++ b/src/Session/Adapter/Noop.php
@@ -93,7 +93,7 @@ public function destroy($id): bool
      * @param int $max_lifetime
      * @return false|int
      */
-    public function gc(int $max_lifetime): int
+    public function gc(int $max_lifetime): int|false
     {
     }
 
diff --git a/src/Session/Adapter/Stream.php b/src/Session/Adapter/Stream.php
index c5ca6608..514481a8 100644
--- a/src/Session/Adapter/Stream.php
+++ b/src/Session/Adapter/Stream.php
@@ -68,7 +68,7 @@ public function destroy($id): bool
      * @param int $max_lifetime
      * @return false|int
      */
-    public function gc(int $max_lifetime): int
+    public function gc(int $max_lifetime): int|false
     {
     }
 
@@ -110,7 +110,7 @@ public function write($id, $data): bool
      * @param string $cast
      * @return mixed
      */
-    protected function getArrVal(array $collection, $index, $defaultValue = null, string $cast = null)
+    protected function getArrVal(array $collection, $index, $defaultValue = null, string $cast = null): mixed
     {
     }
 
diff --git a/src/Session/BagInterface.php b/src/Session/BagInterface.php
index 52e9d16e..ac0047da 100644
--- a/src/Session/BagInterface.php
+++ b/src/Session/BagInterface.php
@@ -20,7 +20,7 @@ interface BagInterface
      * @param string $element
      * @return mixed
      */
-    public function __get(string $element);
+    public function __get(string $element): mixed;
 
     /**
      * @param string $element
@@ -53,7 +53,7 @@ public function init(array $data = []): void;
      * @param string $cast
      * @return mixed
      */
-    public function get(string $element, $defaultValue = null, string $cast = null);
+    public function get(string $element, $defaultValue = null, string $cast = null): mixed;
 
     /**
      * @param string $element
diff --git a/src/Session/Manager.php b/src/Session/Manager.php
index 475935ba..d080f84c 100644
--- a/src/Session/Manager.php
+++ b/src/Session/Manager.php
@@ -62,7 +62,7 @@ public function __construct(array $options = [])
      *
      * @return mixed
      */
-    public function __get(string $key)
+    public function __get(string $key): mixed
     {
     }
 
@@ -125,7 +125,7 @@ public function exists(): bool
      *
      * @return mixed|null
      */
-    public function get(string $key, $defaultValue = null, bool $remove = false)
+    public function get(string $key, $defaultValue = null, bool $remove = false): mixed
     {
     }
 
@@ -298,7 +298,7 @@ private function getUniqueKey(string $key): string
      * @param mixed $defaultValue
      * @return mixed
      */
-    private function getArrVal(array $collection, $index, $defaultValue = null)
+    private function getArrVal(array $collection, $index, $defaultValue = null): mixed
     {
     }
 }
diff --git a/src/Session/ManagerInterface.php b/src/Session/ManagerInterface.php
index 9af730e7..247d9086 100644
--- a/src/Session/ManagerInterface.php
+++ b/src/Session/ManagerInterface.php
@@ -33,7 +33,7 @@ interface ManagerInterface
      * @param string $key
      * @return mixed
      */
-    public function __get(string $key);
+    public function __get(string $key): mixed;
 
     /**
      * Alias: Check whether a session variable is set in an application context
@@ -82,7 +82,7 @@ public function destroy(): void;
      * @param bool $remove
      * @return mixed
      */
-    public function get(string $key, $defaultValue = null, bool $remove = false);
+    public function get(string $key, $defaultValue = null, bool $remove = false): mixed;
 
     /**
      * Returns the session id
diff --git a/src/Storage/Adapter/AbstractAdapter.php b/src/Storage/Adapter/AbstractAdapter.php
index dcacd3c4..57763e89 100644
--- a/src/Storage/Adapter/AbstractAdapter.php
+++ b/src/Storage/Adapter/AbstractAdapter.php
@@ -115,7 +115,7 @@ abstract public function clear(): bool;
      *
      * @return int | bool
      */
-    abstract public function decrement(string $key, int $value = 1);
+    abstract public function decrement(string $key, int $value = 1): int|bool;
 
     /**
      * Deletes data from the adapter
@@ -134,7 +134,7 @@ abstract public function delete(string $key): bool;
      *
      * @return mixed
      */
-    public function get(string $key, $defaultValue = null)
+    public function get(string $key, $defaultValue = null): mixed
     {
     }
 
@@ -143,7 +143,7 @@ public function get(string $key, $defaultValue = null)
      *
      * @return mixed
      */
-    public function getAdapter()
+    public function getAdapter(): mixed
     {
     }
 
@@ -191,7 +191,7 @@ abstract public function has(string $key): bool;
      *
      * @return int | bool
      */
-    abstract public function increment(string $key, int $value = 1);
+    abstract public function increment(string $key, int $value = 1): int|bool;
 
     /**
      * Stores data in the adapter
@@ -251,7 +251,7 @@ protected function getPrefixedKey($key): string
      *
      * @return mixed
      */
-    protected function getSerializedData($content)
+    protected function getSerializedData($content): mixed
     {
     }
 
@@ -275,7 +275,7 @@ protected function getTtl($ttl): int
      *
      * @return mixed
      */
-    protected function getUnserializedData($content, $defaultValue = null)
+    protected function getUnserializedData($content, $defaultValue = null): mixed
     {
     }
 
@@ -297,7 +297,7 @@ protected function initSerializer(): void
      * @param string $cast
      * @return mixed
      */
-    protected function getArrVal(array $collection, $index, $defaultValue = null, string $cast = null)
+    protected function getArrVal(array $collection, $index, $defaultValue = null, string $cast = null): mixed
     {
     }
 
@@ -316,7 +316,7 @@ public function setEventsManager(\Phalcon\Events\ManagerInterface $eventsManager
      *
      * @return ManagerInterface|null
      */
-    public function getEventsManager(): ?ManagerInterface
+    public function getEventsManager(): ManagerInterface|null
     {
     }
 
diff --git a/src/Storage/Adapter/AdapterInterface.php b/src/Storage/Adapter/AdapterInterface.php
index 46e1c225..ec4ec5d7 100644
--- a/src/Storage/Adapter/AdapterInterface.php
+++ b/src/Storage/Adapter/AdapterInterface.php
@@ -30,7 +30,7 @@ public function clear(): bool;
      * @param int $value
      * @return int|bool
      */
-    public function decrement(string $key, int $value = 1);
+    public function decrement(string $key, int $value = 1): int|bool;
 
     /**
      * Deletes data from the adapter
@@ -47,7 +47,7 @@ public function delete(string $key): bool;
      * @param mixed|null $defaultValue *
      * @return mixed
      */
-    public function get(string $key, $defaultValue = null);
+    public function get(string $key, $defaultValue = null): mixed;
 
     /**
      * Returns the already connected adapter or connects to the backend
@@ -55,7 +55,7 @@ public function get(string $key, $defaultValue = null);
      *
      * @return mixed
      */
-    public function getAdapter();
+    public function getAdapter(): mixed;
 
     /**
      * Returns all the keys stored
@@ -87,7 +87,7 @@ public function has(string $key): bool;
      * @param int $value
      * @return int|bool
      */
-    public function increment(string $key, int $value = 1);
+    public function increment(string $key, int $value = 1): int|bool;
 
     /**
      * Stores data in the adapter. If the TTL is `null` (default) or not defined
diff --git a/src/Storage/Adapter/Apcu.php b/src/Storage/Adapter/Apcu.php
index 91d3731e..9121b30d 100644
--- a/src/Storage/Adapter/Apcu.php
+++ b/src/Storage/Adapter/Apcu.php
@@ -56,7 +56,7 @@ public function clear(): bool
      *
      * @return bool|int
      */
-    public function decrement(string $key, int $value = 1)
+    public function decrement(string $key, int $value = 1): int|bool
     {
     }
 
@@ -101,7 +101,7 @@ public function has(string $key): bool
      *
      * @return bool|int
      */
-    public function increment(string $key, int $value = 1)
+    public function increment(string $key, int $value = 1): int|bool
     {
     }
 
@@ -151,7 +151,7 @@ protected function doGet(string $key)
      * @param int $step
      * @return bool|int
      */
-    protected function phpApcuDec($key, int $step = 1)
+    protected function phpApcuDec($key, int $step = 1): int|bool
     {
     }
 
@@ -159,7 +159,7 @@ protected function phpApcuDec($key, int $step = 1)
      * @param mixed $key
      * @return bool|array
      */
-    protected function phpApcuDelete($key)
+    protected function phpApcuDelete($key): bool|array
     {
     }
 
@@ -167,7 +167,7 @@ protected function phpApcuDelete($key)
      * @param mixed $key
      * @return bool|array
      */
-    protected function phpApcuExists($key)
+    protected function phpApcuExists($key): bool|array
     {
     }
 
@@ -176,7 +176,7 @@ protected function phpApcuExists($key)
      * @param int $step
      * @return bool|int
      */
-    protected function phpApcuInc($key, int $step = 1)
+    protected function phpApcuInc($key, int $step = 1): int|bool
     {
     }
 
@@ -184,7 +184,7 @@ protected function phpApcuInc($key, int $step = 1)
      * @param mixed $key
      * @return mixed
      */
-    protected function phpApcuFetch($key)
+    protected function phpApcuFetch($key): mixed
     {
     }
 
@@ -192,7 +192,7 @@ protected function phpApcuFetch($key)
      * @param string $pattern
      * @return bool|APCUIterator
      */
-    protected function phpApcuIterator(string $pattern)
+    protected function phpApcuIterator(string $pattern): APCUIterator|bool
     {
     }
 
@@ -202,7 +202,7 @@ protected function phpApcuIterator(string $pattern)
      * @param int $ttl
      * @return bool|array
      */
-    protected function phpApcuStore($key, $payload, int $ttl = 0)
+    protected function phpApcuStore($key, $payload, int $ttl = 0): bool|array
     {
     }
 }
diff --git a/src/Storage/Adapter/Libmemcached.php b/src/Storage/Adapter/Libmemcached.php
index e8ae138f..c88a711d 100644
--- a/src/Storage/Adapter/Libmemcached.php
+++ b/src/Storage/Adapter/Libmemcached.php
@@ -56,7 +56,7 @@ public function clear(): bool
      * @return bool|int
      * @throws StorageException
      */
-    public function decrement(string $key, int $value = 1)
+    public function decrement(string $key, int $value = 1): int|bool
     {
     }
 
@@ -79,7 +79,7 @@ public function delete(string $key): bool
      * @return \Memcached|null
      * @throws StorageException
      */
-    public function getAdapter()
+    public function getAdapter(): mixed
     {
     }
 
@@ -116,7 +116,7 @@ public function has(string $key): bool
      * @return bool|int
      * @throws StorageException
      */
-    public function increment(string $key, int $value = 1)
+    public function increment(string $key, int $value = 1): int|bool
     {
     }
 
diff --git a/src/Storage/Adapter/Memory.php b/src/Storage/Adapter/Memory.php
index d9669d89..9537d7c8 100644
--- a/src/Storage/Adapter/Memory.php
+++ b/src/Storage/Adapter/Memory.php
@@ -56,7 +56,7 @@ public function clear(): bool
      *
      * @return bool|int
      */
-    public function decrement(string $key, int $value = 1)
+    public function decrement(string $key, int $value = 1): int|bool
     {
     }
 
@@ -101,7 +101,7 @@ public function has(string $key): bool
      *
      * @return bool|int
      */
-    public function increment(string $key, int $value = 1)
+    public function increment(string $key, int $value = 1): int|bool
     {
     }
 
diff --git a/src/Storage/Adapter/Redis.php b/src/Storage/Adapter/Redis.php
index 8548d8d5..51eeb39c 100644
--- a/src/Storage/Adapter/Redis.php
+++ b/src/Storage/Adapter/Redis.php
@@ -70,7 +70,7 @@ public function clear(): bool
      * @return bool|int
      * @throws StorageException
      */
-    public function decrement(string $key, int $value = 1)
+    public function decrement(string $key, int $value = 1): int|bool
     {
     }
 
@@ -93,7 +93,7 @@ public function delete(string $key): bool
      * @return mixed|\Redis
      * @throws StorageException
      */
-    public function getAdapter()
+    public function getAdapter(): mixed
     {
     }
 
@@ -130,7 +130,7 @@ public function has(string $key): bool
      * @return bool|false|int
      * @throws StorageException
      */
-    public function increment(string $key, int $value = 1)
+    public function increment(string $key, int $value = 1): int|bool
     {
     }
 
diff --git a/src/Storage/Adapter/Stream.php b/src/Storage/Adapter/Stream.php
index edb4c38f..1fe43d9a 100644
--- a/src/Storage/Adapter/Stream.php
+++ b/src/Storage/Adapter/Stream.php
@@ -71,7 +71,7 @@ public function clear(): bool
      *
      * @return bool|int
      */
-    public function decrement(string $key, int $value = 1)
+    public function decrement(string $key, int $value = 1): int|bool
     {
     }
 
@@ -94,7 +94,7 @@ public function delete(string $key): bool
      *
      * @return mixed|null
      */
-    public function get(string $key, $defaultValue = null)
+    public function get(string $key, $defaultValue = null): mixed
     {
     }
 
@@ -128,7 +128,7 @@ public function has(string $key): bool
      *
      * @return bool|int
      */
-    public function increment(string $key, int $value = 1)
+    public function increment(string $key, int $value = 1): int|bool
     {
     }
 
@@ -255,7 +255,7 @@ protected function phpFileExists(string $filename): bool
      * @param string $filename
      * @return string|bool
      */
-    protected function phpFileGetContents(string $filename)
+    protected function phpFileGetContents(string $filename): bool|string
     {
     }
 
@@ -266,7 +266,7 @@ protected function phpFileGetContents(string $filename)
      * @param mixed $context
      * @return int|bool
      */
-    protected function phpFilePutContents(string $filename, $data, int $flags = 0, $context = null)
+    protected function phpFilePutContents(string $filename, $data, int $flags = 0, $context = null): int|bool
     {
     }
 
@@ -275,7 +275,7 @@ protected function phpFilePutContents(string $filename, $data, int $flags = 0, $
      * @param string $mode
      * @return mixed
      */
-    protected function phpFopen(string $filename, string $mode)
+    protected function phpFopen(string $filename, string $mode): mixed
     {
     }
 
diff --git a/src/Storage/Adapter/Weak.php b/src/Storage/Adapter/Weak.php
index 53df27db..c8047efa 100644
--- a/src/Storage/Adapter/Weak.php
+++ b/src/Storage/Adapter/Weak.php
@@ -21,7 +21,7 @@
 class Weak extends \Phalcon\Storage\Adapter\AbstractAdapter
 {
     /**
-     * @var int|null
+     * @var string|null
      */
     protected $fetching = null;
 
@@ -63,7 +63,7 @@ public function clear(): bool
      *
      * @return bool|int
      */
-    public function decrement(string $key, int $value = 1)
+    public function decrement(string $key, int $value = 1): int|bool
     {
     }
 
@@ -97,7 +97,7 @@ public function getKeys(string $prefix = ''): array
      *
      * @return bool|int
      */
-    public function increment(string $key, int $value = 1)
+    public function increment(string $key, int $value = 1): int|bool
     {
     }
 
@@ -108,7 +108,7 @@ public function increment(string $key, int $value = 1)
      * @param mixed|null $defaultValue *
      * @return mixed
      */
-    public function get(string $key, $defaultValue = null)
+    public function get(string $key, $defaultValue = null): mixed
     {
     }
 
diff --git a/src/Storage/Serializer/Igbinary.php b/src/Storage/Serializer/Igbinary.php
index 46d67f4d..99fc41de 100644
--- a/src/Storage/Serializer/Igbinary.php
+++ b/src/Storage/Serializer/Igbinary.php
@@ -46,7 +46,7 @@ public function unserialize($data): void
      *
      * @return string|null
      */
-    protected function phpIgbinarySerialize($value): ?string
+    protected function phpIgbinarySerialize($value): string|null
     {
     }
 
@@ -57,7 +57,7 @@ protected function phpIgbinarySerialize($value): ?string
      *
      * @return string|null
      */
-    protected function doSerialize($value): ?string
+    protected function doSerialize($value): string|null
     {
     }
 
diff --git a/src/Storage/Serializer/None.php b/src/Storage/Serializer/None.php
index 59c7da77..53af81fb 100644
--- a/src/Storage/Serializer/None.php
+++ b/src/Storage/Serializer/None.php
@@ -24,7 +24,7 @@ class None extends \Phalcon\Storage\Serializer\AbstractSerializer
      *
      * @return mixed
      */
-    public function serialize()
+    public function serialize(): mixed
     {
     }
 
diff --git a/src/Storage/Serializer/Php.php b/src/Storage/Serializer/Php.php
index 4b117985..a9ac87dc 100644
--- a/src/Storage/Serializer/Php.php
+++ b/src/Storage/Serializer/Php.php
@@ -46,7 +46,7 @@ public function unserialize($data): void
      *
      * @return mixed
      */
-    private function phpUnserialize(string $data, array $options = [])
+    private function phpUnserialize(string $data, array $options = []): mixed
     {
     }
 }
diff --git a/src/Storage/Serializer/SerializerInterface.php b/src/Storage/Serializer/SerializerInterface.php
index 021ad6e5..b1246f95 100644
--- a/src/Storage/Serializer/SerializerInterface.php
+++ b/src/Storage/Serializer/SerializerInterface.php
@@ -24,7 +24,7 @@ interface SerializerInterface extends \Serializable
     /**
      * @return mixed
      */
-    public function getData();
+    public function getData(): mixed;
 
     /**
      * @param mixed $data
diff --git a/src/Support/Collection.php b/src/Support/Collection.php
index 23948682..080f751f 100644
--- a/src/Support/Collection.php
+++ b/src/Support/Collection.php
@@ -68,7 +68,7 @@ public function __construct(array $data = [], bool $insensitive = true)
      * @param string $element
      * @return mixed
      */
-    public function __get(string $element)
+    public function __get(string $element): mixed
     {
     }
 
@@ -130,7 +130,7 @@ public function count(): int
      * @param string $cast
      * @return mixed
      */
-    public function get(string $element, $defaultValue = null, string $cast = null)
+    public function get(string $element, $defaultValue = null, string $cast = null): mixed
     {
     }
 
@@ -210,7 +210,7 @@ public function offsetExists($element): bool
      * @param mixed $element
      * @return mixed
      */
-    public function offsetGet($element)
+    public function offsetGet($element): mixed
     {
     }
 
@@ -264,7 +264,7 @@ public function set(string $element, $value): void
      *
      * @return string|null
      */
-    public function serialize(): ?string
+    public function serialize(): string|null
     {
     }
 
diff --git a/src/Support/Collection/CollectionInterface.php b/src/Support/Collection/CollectionInterface.php
index 31de7e9f..ea00124a 100644
--- a/src/Support/Collection/CollectionInterface.php
+++ b/src/Support/Collection/CollectionInterface.php
@@ -20,7 +20,7 @@ interface CollectionInterface
      * @param string $element
      * @return mixed
      */
-    public function __get(string $element);
+    public function __get(string $element): mixed;
 
     /**
      * @param string $element
@@ -52,7 +52,7 @@ public function clear(): void;
      * @param string $cast
      * @return mixed
      */
-    public function get(string $element, $defaultValue = null, string $cast = null);
+    public function get(string $element, $defaultValue = null, string $cast = null): mixed;
 
     /**
      * @param bool $insensitive
diff --git a/src/Support/Debug.php b/src/Support/Debug.php
index f3aa47a7..bb80025a 100644
--- a/src/Support/Debug.php
+++ b/src/Support/Debug.php
@@ -266,7 +266,7 @@ protected function escapeString(string $value): string
      * @param array $argument
      * @param mixed $n
      */
-    protected function getArrayDump(array $argument, $n = 0): ?string
+    protected function getArrayDump(array $argument, $n = 0): string|null
     {
     }
 
@@ -300,7 +300,7 @@ final protected function showTraceItem(int $n, array $trace): string
      * @param mixed $defaultValue
      * @return mixed
      */
-    private function getArrVal(array $collection, $index, $defaultValue = null)
+    private function getArrVal(array $collection, $index, $defaultValue = null): mixed
     {
     }
 }
diff --git a/src/Support/Helper/Arr/Filter.php b/src/Support/Helper/Arr/Filter.php
index 519595d5..47aaf6b2 100644
--- a/src/Support/Helper/Arr/Filter.php
+++ b/src/Support/Helper/Arr/Filter.php
@@ -20,7 +20,7 @@ class Filter extends \Phalcon\Support\Helper\Arr\AbstractArr
      *
      * @return mixed
      */
-    public function __invoke(array $collection, $method = null)
+    public function __invoke(array $collection, $method = null): mixed
     {
     }
 }
diff --git a/src/Support/Helper/Arr/First.php b/src/Support/Helper/Arr/First.php
index 5b2a4955..500b7674 100644
--- a/src/Support/Helper/Arr/First.php
+++ b/src/Support/Helper/Arr/First.php
@@ -21,7 +21,7 @@ class First extends \Phalcon\Support\Helper\Arr\AbstractArr
      *
      * @return mixed
      */
-    public function __invoke(array $collection, $method = null)
+    public function __invoke(array $collection, $method = null): mixed
     {
     }
 }
diff --git a/src/Support/Helper/Arr/FirstKey.php b/src/Support/Helper/Arr/FirstKey.php
index b86b0a9a..e0760417 100644
--- a/src/Support/Helper/Arr/FirstKey.php
+++ b/src/Support/Helper/Arr/FirstKey.php
@@ -21,7 +21,7 @@ class FirstKey extends \Phalcon\Support\Helper\Arr\AbstractArr
      *
      * @return mixed
      */
-    public function __invoke(array $collection, $method = null)
+    public function __invoke(array $collection, $method = null): mixed
     {
     }
 }
diff --git a/src/Support/Helper/Arr/Get.php b/src/Support/Helper/Arr/Get.php
index edc26e45..0099f4cd 100644
--- a/src/Support/Helper/Arr/Get.php
+++ b/src/Support/Helper/Arr/Get.php
@@ -24,7 +24,7 @@ class Get
      *
      * @return mixed|null
      */
-    public function __invoke(array $collection, $index, $defaultValue = null, string $cast = null)
+    public function __invoke(array $collection, $index, $defaultValue = null, string $cast = null): mixed
     {
     }
 }
diff --git a/src/Support/Helper/Arr/Last.php b/src/Support/Helper/Arr/Last.php
index 469d599d..59323d7e 100644
--- a/src/Support/Helper/Arr/Last.php
+++ b/src/Support/Helper/Arr/Last.php
@@ -21,7 +21,7 @@ class Last extends \Phalcon\Support\Helper\Arr\AbstractArr
      *
      * @return mixed
      */
-    public function __invoke(array $collection, $method = null)
+    public function __invoke(array $collection, $method = null): mixed
     {
     }
 }
diff --git a/src/Support/Helper/Arr/LastKey.php b/src/Support/Helper/Arr/LastKey.php
index a4ba6482..a53793a8 100644
--- a/src/Support/Helper/Arr/LastKey.php
+++ b/src/Support/Helper/Arr/LastKey.php
@@ -21,7 +21,7 @@ class LastKey extends \Phalcon\Support\Helper\Arr\AbstractArr
      *
      * @return mixed
      */
-    public function __invoke(array $collection, $method = null)
+    public function __invoke(array $collection, $method = null): mixed
     {
     }
 }
diff --git a/src/Support/Helper/Arr/ToObject.php b/src/Support/Helper/Arr/ToObject.php
index 4a24639c..5155fe80 100644
--- a/src/Support/Helper/Arr/ToObject.php
+++ b/src/Support/Helper/Arr/ToObject.php
@@ -19,7 +19,7 @@ class ToObject
      *
      * @return object
      */
-    public function __invoke(array $collection)
+    public function __invoke(array $collection): object
     {
     }
 }
diff --git a/src/Support/Registry.php b/src/Support/Registry.php
index ac958475..c606abde 100644
--- a/src/Support/Registry.php
+++ b/src/Support/Registry.php
@@ -79,7 +79,7 @@ final public function __construct(array $data = [])
      * @param string $element
      * @return mixed
      */
-    final public function __get(string $element)
+    final public function __get(string $element): mixed
     {
     }
 
@@ -141,7 +141,7 @@ final public function count(): int
      * @param string $cast
      * @return mixed
      */
-    final public function get(string $element, $defaultValue = null, string $cast = null)
+    final public function get(string $element, $defaultValue = null, string $cast = null): mixed
     {
     }
 
@@ -202,7 +202,7 @@ final public function offsetExists($element): bool
      * @param mixed $element
      * @return mixed
      */
-    final public function offsetGet($element)
+    final public function offsetGet($element): mixed
     {
     }
 
@@ -245,7 +245,7 @@ final public function remove(string $element): void
      * @link https://php.net/manual/en/serializable.serialize.php
      * @return string|null
      */
-    final public function serialize(): ?string
+    final public function serialize(): string|null
     {
     }
 
diff --git a/src/Tag.php b/src/Tag.php
index a46538f4..43f2819f 100644
--- a/src/Tag.php
+++ b/src/Tag.php
@@ -284,7 +284,7 @@ public static function getDocType(): string
      * @param array $params
      * @return EscaperInterface|null
      */
-    public static function getEscaper(array $params): ?EscaperInterface
+    public static function getEscaper(array $params): EscaperInterface|null
     {
     }
 
diff --git a/src/Translate/Adapter/AbstractAdapter.php b/src/Translate/Adapter/AbstractAdapter.php
index 9571e206..0f298b4d 100644
--- a/src/Translate/Adapter/AbstractAdapter.php
+++ b/src/Translate/Adapter/AbstractAdapter.php
@@ -73,7 +73,7 @@ public function offsetExists($translateKey): bool
      *
      * @return mixed
      */
-    public function offsetGet($translateKey)
+    public function offsetGet($translateKey): mixed
     {
     }
 
diff --git a/src/Translate/Adapter/Gettext.php b/src/Translate/Adapter/Gettext.php
index 79a0ac4c..ec5715bf 100644
--- a/src/Translate/Adapter/Gettext.php
+++ b/src/Translate/Adapter/Gettext.php
@@ -104,7 +104,7 @@ public function getDefaultDomain(): string
     /**
      * @return string|array
      */
-    public function getDirectory()
+    public function getDirectory(): string|array
     {
     }
 
@@ -228,7 +228,7 @@ public function setDomain(string $domain = null): string
      *
      * @return false|string
      */
-    public function setLocale(int $category, array $localeArray = [])
+    public function setLocale(int $category, array $localeArray = []): bool|string
     {
     }