diff --git a/app/admin/middleware/v1/Auth.php b/app/admin/middleware/v1/Auth.php
index 1787382e..ab00f385 100644
--- a/app/admin/middleware/v1/Auth.php
+++ b/app/admin/middleware/v1/Auth.php
@@ -9,7 +9,7 @@ class Auth extends \thans\jwt\middleware\BaseMiddleware
     // 获取语言信息
     private function setLanguage($request)
     {
-        $code = $request->cookie('lang', 'zh_cn');
+        $code = $request->cookie('lang', 'zh-cn');
         $lang = LanguageModel::cache('lang:code.' . $code, 3600, 'lang')
             ->field(['id', 'name', 'code', 'icon', 'url'])
             ->withJoin(['country' => ['id', 'name', 'code', 'icon']])