diff --git a/README.md b/README.md
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 ### MySQL
 
-* [MySQL索引背后的数据结构及算法原理](http://www.cnblogs.com/leoo2sk/archive/2011/07/10/mysql-index.html)
+* [MySQL索引背后的数据结构及算法原理](http://blog.codinglabs.org/articles/theory-of-mysql-index.html)
 
 ### 项目相关