diff --git a/app/Http/Controllers/ClientController.php b/app/Http/Controllers/ClientController.php
index 1ca3fab7..88ab17e0 100755
--- a/app/Http/Controllers/ClientController.php
+++ b/app/Http/Controllers/ClientController.php
@@ -22,7 +22,7 @@ class ClientController extends Controller
               }
           }
         }
-        if(strpos($_SERVER['HTTP_USER_AGENT'], 'Quantumult-X') !== false) {
+        if(strpos($_SERVER['HTTP_USER_AGENT'], 'Quantumult%20X') !== false) {
           die($this->quantumultX($user, $server));
         }
         if(strpos($_SERVER['HTTP_USER_AGENT'], 'Quantumult') !== false) {