diff --git a/README.md b/README.md
index 94fe716..208f782 100644
--- a/README.md
+++ b/README.md
@@ -346,7 +346,7 @@
 * [Ruby on Rails 指南](http://guides.ruby-china.org/)
 * [Ruby on Rails 實戰聖經](http://ihower.tw/rails4/index.html)
 * [Ruby on Rails Tutorial 原书第 2 版](http://railstutorial-china.org/) (本书网页版免费提供，电子版以 PDF、EPub 和 Mobi 格式提供购买，仅售 9.9 美元)
-* [编写Ruby的C拓展](http://wusuopu.gitbooks.io/write-ruby-extension-with-c/index.html)
+* [编写Ruby的C拓展](http://wusuopu.gitbooks.io/write-ruby-extension-with-c/content/)
 
 ### Shell