diff --git a/app/Http/Middleware/ValidateSignature.php b/app/Http/Middleware/ValidateSignature.php
index 093bf64..e5cb4bd 100644
--- a/app/Http/Middleware/ValidateSignature.php
+++ b/app/Http/Middleware/ValidateSignature.php
@@ -11,7 +11,7 @@ class ValidateSignature extends Middleware
      *
      * @var array<int, string>
      */
-    protected $except = [
+    protected array $except = [
         // 'fbclid',
         // 'utm_campaign',
         // 'utm_content',