diff --git a/Protocols/Http/Request.php b/Protocols/Http/Request.php
index d544ac0d9..6eca3e4ef 100644
--- a/Protocols/Http/Request.php
+++ b/Protocols/Http/Request.php
@@ -169,7 +169,7 @@ public function cookie($name = null, $default = null)
      * @param string|null $name
      * @return array|null
      */
-    public function file($name = null)
+    public function file(?string $name = null): mixed
     {
         if (!isset($this->_data['files'])) {
             $this->parsePost();