diff --git a/src/Request/AbstractRequest.php b/src/Request/AbstractRequest.php
index 9bcedbd..97033b3 100644
--- a/src/Request/AbstractRequest.php
+++ b/src/Request/AbstractRequest.php
@@ -111,9 +111,7 @@ public function __construct(array $options = [])
             $this->setFormat($this->getOption('format'));
         }
 
-        if (true === $this->hasOption('headers')
-            && true === is_array($this->getOption('headers'))
-        ) {
+        if (true === $this->hasOption('headers') && true === is_array($this->getOption('headers'))) {
             $this->setHeaders($this->getOption('headers'));
         }
 
@@ -138,7 +136,7 @@ public function getParams(): array
     }
 
     /**
-     * @param string|int $name
+     * @param string|integer $name
      *
      * @return mixed|null
      */
@@ -153,7 +151,7 @@ public function getParam($name)
     /**
      * @param string|integer $name
      *
-     * @return bool
+     * @return boolean
      */
     public function hasParam($name): bool
     {
@@ -188,7 +186,7 @@ public function setParams(array $params): self
         $optionalParams = [];
         foreach ($this->getOptionalParams() as $paramName => $paramDefinition) {
             # If optional paramater is provided...
-            if(isset($params[$paramName])) {
+            if (isset($params[$paramName])) {
                 if (true === is_string($paramDefinition) && '' !== $paramDefinition && 1 !== preg_match("/^{$paramDefinition}$/", $this->getParam($paramName))) {
                     throw new InvalidArgumentException(sprintf('Optional param %s is not valid. It must match "%s"', $paramName, $paramDefinition));
                 }
@@ -204,7 +202,7 @@ public function setParams(array $params): self
     }
 
     /**
-     * @inheritDoc
+     * @return string
      */
     public function getUri(): string
     {
@@ -223,7 +221,7 @@ public function setUri(string $uri): self
     }
 
     /**
-     * @inheritDoc
+     * @return string
      */
     public function getMethod(): string
     {
@@ -346,16 +344,15 @@ public function getBody(): string
      *
      * @return AbstractRequest
      */
-    public function setBody($body): self
+    public function setBody(mixed $body): self
     {
         $this->body = $body;
         return $this;
     }
 
     /**
-     * @inheritDoc
-     *
-     * @return AbstractRequest
+     * @param Client $client
+     * @return $this
      */
     public function applyClient(Client $client): self
     {
@@ -433,7 +430,7 @@ public function addFilter(FilterInterface $filter): self
      *
      * @return string
      */
-    private function encodeBody($body): string
+    private function encodeBody(mixed $body): string
     {
         $encoder = new JsonEncoder();
         $contentTypeHeader = 'application/json';
@@ -616,7 +613,7 @@ protected function flattenErrors(array $errors, string $context = ''): array
      *
      * @return void
      */
-    protected function validateBody($body): void
+    protected function validateBody(mixed $body): void
     {
         if (true === is_string($body)) {
             return;