diff --git a/app/Services/VipService.php b/app/Services/VipService.php
index 682a112b..1d7f292a 100644
--- a/app/Services/VipService.php
+++ b/app/Services/VipService.php
@@ -100,7 +100,7 @@ class VipService
                 $start->addYears($num);
                 break;
             case Vip::TIME_MONTH:
-                $start->addYears($num);
+                $start->addMonths($num);
                 break;
             case TIME_DAY:
                 $start->addDays($num);