diff --git a/src/danog/MadelineProto/MTProtoTools/AuthKeyHandler.php b/src/danog/MadelineProto/MTProtoTools/AuthKeyHandler.php
index f689a4f0..dd8fb54a 100644
--- a/src/danog/MadelineProto/MTProtoTools/AuthKeyHandler.php
+++ b/src/danog/MadelineProto/MTProtoTools/AuthKeyHandler.php
@@ -414,7 +414,7 @@ trait AuthKeyHandler
             }
         }
 
-        throw new \danog\MadelineProto\SecurityException('Auth Failed');
+        if (strpos($datacenter, 'cdn') === false) throw new \danog\MadelineProto\SecurityException('Auth Failed');
     }
 
     public function check_G($g_a, $p)