diff --git a/source/mooc/index.md b/source/mooc/index.md
index 5076dc4d798dd9d5bbbae00c0a6c2ce7c42b30ab..4259a3972d0ffa835153dd475c1033da73a03356 100644
--- a/source/mooc/index.md
+++ b/source/mooc/index.md
@@ -56,11 +56,10 @@ date: 2017-08-31 10:46:28
 
 ## 机器学习
 
-+   [斯坦福 CS221](https://www.douban.com/note/177781446/)
++   [UCB CS188](http://ai.berkeley.edu/home.html)
 +   斯坦福 CS229
     +   [视频](http://open.163.com/special/opencourse/machinelearning.html)
     +   [讲义](https://github.com/Kivy-CN/Stanford-CS-229-CN)
-+   [斯坦福 CS228](https://cs.stanford.edu/~ermon/cs228/index.html)
 +   斯坦福 CS231n
     +   [视频](https://www.bilibili.com/video/av17204303/)
     +   [讲义](https://zhuanlan.zhihu.com/p/21930884?refer=intelligentunit)