diff --git a/docs/source/zh-cn/core/cookie-and-session.md b/docs/source/zh-cn/core/cookie-and-session.md
index 84c5cd243d..abaaec7d1c 100644
--- a/docs/source/zh-cn/core/cookie-and-session.md
+++ b/docs/source/zh-cn/core/cookie-and-session.md
@@ -187,8 +187,8 @@ exports.login = function* (ctx) {
 
   // 设置 Session
   this.session.user = user;
-  // 如果用户勾选了 `记住我`，设置一分钟的过期时间
-  if (rememberMe) this.session.maxAge = ms('1m');
+  // 如果用户勾选了 `记住我`，设置 30 天的过期时间
+  if (rememberMe) this.session.maxAge = ms('30d');
 };
 ```
 
@@ -215,4 +215,4 @@ exports.middleware = [ 'saveSession' ];
 ```
 
 [egg-redis]: https://github.com/eggjs/egg-redis
-[egg-session-redis]: https://github.com/eggjs/egg-session-redis
\ No newline at end of file
+[egg-session-redis]: https://github.com/eggjs/egg-session-redis