diff --git a/docs/_templates/main.html b/docs/_templates/main.html
index e609155..beebd73 100644
--- a/docs/_templates/main.html
+++ b/docs/_templates/main.html
@@ -1,7 +1,7 @@
 {% extends "base.html" %}
 
 {% block announce %}
-📌《Flask Web 开发实战》第 2 版正在写作中，预计 2022 年初上市。写作进度见<a href="https://helloflask.com/book/4" target="_blank" style="color: #526cfe">本书主页</a>。欢迎关注 <a href="https://twitter.com/helloflask" target="_blank" style="color: #526cfe">Twitter</a> 或<a href="https://greyli.com/files/qrcode_gh.jpg" target="_blank" style="color: #526cfe">微信公众号</a>获取最新动态。
+📌《Flask Web 开发实战》第 2 版正在写作中，预计 2023 年初上市。写作进度见<a href="https://helloflask.com/book/4" target="_blank" style="color: #526cfe">本书主页</a>。欢迎关注 <a href="https://twitter.com/helloflask" target="_blank" style="color: #526cfe">Twitter</a> 或<a href="https://greyli.com/files/qrcode_gh.jpg" target="_blank" style="color: #526cfe">微信公众号</a>获取最新动态。
 {% endblock %}
 
 {% block extrahead %}
diff --git a/mkdocs.yml b/mkdocs.yml
index 685064b..d074c83 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -68,8 +68,8 @@ nav:
         - 第 6 章：电子邮件: book/4/snippets/c6.md
   - Flask 入门教程:
     - 主页↗: https://helloflask.com/book/3
-    - GitHub↗: https://github.com/greyli/flask-tutorial
-    - 在线阅读↗: https://read.helloflask.com
+    - GitHub↗: https://github.com/helloflask/flask-tutorial
+    - 在线阅读↗: https://tutorial.helloflask.com
   - Python Web API 设计与开发:
     - 主页↗: https://helloflask.com/book/2
   - 变更记录: changes.md