diff --git a/notes/设计模式 - 责任链.md b/notes/设计模式 - 责任链.md
index c652e334..c6bd0f17 100644
--- a/notes/设计模式 - 责任链.md	
+++ b/notes/设计模式 - 责任链.md	
@@ -125,5 +125,5 @@ request2 is handle by ConcreteHandler2
 ### JDK
 
 - [java.util.logging.Logger#log()](http://docs.oracle.com/javase/8/docs/api/java/util/logging/Logger.html#log%28java.util.logging.Level,%20java.lang.String%29)
-- [Apache Commons Chain](https://commons.apache.org/proper/commons-chain/index.html)
+- [Apache Commons Chain](https://commons.apache.org/dormant/commons-chain/)
 - [javax.servlet.Filter#doFilter()](http://docs.oracle.com/javaee/7/api/javax/servlet/Filter.html#doFilter-javax.servlet.ServletRequest-javax.servlet.ServletResponse-javax.servlet.FilterChain-)