diff --git a/app/Http/Requests/V3/Mission/RequestPortal/UpdateRequest.php b/app/Http/Requests/V3/Mission/RequestPortal/UpdateRequest.php
index c463fc53..4498ea7b 100644
--- a/app/Http/Requests/V3/Mission/RequestPortal/UpdateRequest.php
+++ b/app/Http/Requests/V3/Mission/RequestPortal/UpdateRequest.php
@@ -11,7 +11,7 @@ class UpdateRequest extends FormRequest
      */
     public function authorize(): bool
     {
-        return true;
+        return ($this->route('mission'))->user_id === auth()->id();
     }
 
     /**