diff --git a/app/controller/SmsController.php b/app/controller/SmsController.php
index ecd2d64..4eaf487 100644
--- a/app/controller/SmsController.php
+++ b/app/controller/SmsController.php
@@ -173,7 +173,7 @@ class SmsController
 
         $uuid = uniqid('', true);
         $uuid = md5($uuid);
-        $uuid = substr($uuid, 0, 8) . ' - ' . substr($uuid, 8, 4) . ' - ' . substr($uuid, 12, 4) . ' - ' . substr($uuid, 16, 4) . ' - ' . substr($uuid, 20, 12);
+        $uuid = substr($uuid, 0, 8) . '-' . substr($uuid, 8, 4) . '-' . substr($uuid, 12, 4) . '-' . substr($uuid, 16, 4) . '-' . substr($uuid, 20, 12);
 
         $uuidExist = SmsApp::where('app_uuid', $uuid)->first();
         if ($uuidExist) {