diff --git a/app/Http/Middleware/Authenticate.php b/app/Http/Middleware/Authenticate.php
index d270c8c..44f7a44 100644
--- a/app/Http/Middleware/Authenticate.php
+++ b/app/Http/Middleware/Authenticate.php
@@ -44,7 +44,7 @@ public function handle($request, Closure $next, $guard = null)
 
         $user = $this->auth->guard($guard)->user();
         if ($user->banned_at) {
-            return $this->forbidden('您已被封禁，原因是: ' . $user->banned_reason);
+            return $this->forbidden('您已被封禁，原因是: ' . $user->banned_reason ?? '一次或多次触犯了我们的规则。');
         }
 
         return $next($request);