diff --git a/lib/wechat/lib/wechat/api.rb b/lib/wechat/lib/wechat/api.rb
index e2af6cb53..e42b3f782 100644
--- a/lib/wechat/lib/wechat/api.rb
+++ b/lib/wechat/lib/wechat/api.rb
@@ -125,8 +125,7 @@ module Wechat
     def web_userinfo(access_token,openid)
       params = {
           access_token: access_token,
-          openid: openid,
-          lang: "zh_CN"
+          openid: openid
       }
       get 'userinfo', params: params, base: OAUTH2_USERINFO
     end