diff --git a/src/Exception/RequestException.php b/src/Exception/RequestException.php
index 9c4631b..adee3c3 100644
--- a/src/Exception/RequestException.php
+++ b/src/Exception/RequestException.php
@@ -20,8 +20,12 @@ class RequestException extends HttpException
      *
      * @param RequestInterface $request The request.
      */
-    public function __construct(RequestInterface $request, $message = "", $code = 0, Throwable $previous = null)
-    {
+    public function __construct(
+        RequestInterface $request,
+        string $message = "",
+        int $code = 0,
+        Throwable $previous = null
+    ) {
         parent::__construct($message, $code, $previous);
 
         $this->request = $request;
diff --git a/src/Exception/ResponseException.php b/src/Exception/ResponseException.php
index 901e563..e397a38 100644
--- a/src/Exception/ResponseException.php
+++ b/src/Exception/ResponseException.php
@@ -24,7 +24,7 @@ class ResponseException extends RequestException
     public function __construct(
         RequestInterface $request,
         ResponseInterface $response,
-        $message = "",
+        string $message = "",
         Throwable $previous = null
     ) {
         parent::__construct($request, $message, $response->getStatusCode(), $previous);