diff --git a/src/Http/HttpClientContextStrata.php b/src/Http/HttpClientContextStrata.php
index e59ed9c..28e0e0f 100644
--- a/src/Http/HttpClientContextStrata.php
+++ b/src/Http/HttpClientContextStrata.php
@@ -30,7 +30,7 @@ trait HttpClientContextStrata
 {
     use ContextStrata;
 
-    public function __construct($message = null, $code = 0, Throwable $previous = null)
+    public function __construct(?string $message = null, ?int $code = 0, ?Throwable $previous = null)
     {
         parent::__construct($message ?? $this->suggestErrorMessage(), $code ?? 0, $previous);
     }
diff --git a/src/Http/HttpServerContextStrata.php b/src/Http/HttpServerContextStrata.php
index fff2b49..d3e46db 100644
--- a/src/Http/HttpServerContextStrata.php
+++ b/src/Http/HttpServerContextStrata.php
@@ -30,7 +30,7 @@ trait HttpServerContextStrata
 {
     use ContextStrata;
 
-    public function __construct($message = null, $code = 0, Throwable $previous = null)
+    public function __construct(?string $message = null, ?int $code = 0, ?Throwable $previous = null)
     {
         parent::__construct($message ?? $this->suggestErrorMessage(), $code ?? 0, $previous);
     }
diff --git a/src/LogicException.php b/src/LogicException.php
index 8034929..ee574ca 100644
--- a/src/LogicException.php
+++ b/src/LogicException.php
@@ -18,7 +18,7 @@ class LogicException extends \LogicException implements
 {
     use ContextStrata;
 
-    public function __construct($message = null, $code = 0, Throwable $previous = null)
+    public function __construct(?string $message = null, ?int $code = 0, ?Throwable $previous = null)
     {
         parent::__construct($message ?? '', $code ?? 0, $previous);
     }
diff --git a/src/RuntimeException.php b/src/RuntimeException.php
index c25bb5a..3847b31 100644
--- a/src/RuntimeException.php
+++ b/src/RuntimeException.php
@@ -18,7 +18,7 @@ class RuntimeException extends \RuntimeException implements
 {
     use ContextStrata;
 
-    public function __construct($message = null, $code = 0, Throwable $previous = null)
+    public function __construct(?string $message = null, ?int $code = 0, ?Throwable $previous = null)
     {
         parent::__construct($message ?? '', $code ?? 0, $previous);
     }