diff --git a/app/common/controller/SystemController.php b/app/common/controller/SystemController.php
index 73f84d2..1c341e9 100644
--- a/app/common/controller/SystemController.php
+++ b/app/common/controller/SystemController.php
@@ -193,7 +193,7 @@ class SystemController
             'system_code' => $systemCode,
             'login_ip'    => $ip,
             'user_agent'  => $ua,
-            'expired_at'  => date('Y-m-d H:i:s', $expireAt),
+            'expired_at'  => $expireAt,
         ]);
     }
 }