diff --git a/app/Http/Controllers/API/Settings/ExtensionController.php b/app/Http/Controllers/API/Settings/ExtensionController.php
index 049274b8..65726fa5 100644
--- a/app/Http/Controllers/API/Settings/ExtensionController.php
+++ b/app/Http/Controllers/API/Settings/ExtensionController.php
@@ -44,7 +44,7 @@ public function index()
     public function upload()
     {
         validate([
-            'extension' => 'required|max:5000000',
+            'extension' => 'required|max:5000000|mimes:zip,lmne,signed',
         ]);
 
         $verify = false;