diff --git a/sidebar.md b/sidebar.md
index ee85a72..d8383b9 100644
--- a/sidebar.md
+++ b/sidebar.md
@@ -2,6 +2,8 @@
 
 作者：[阮一峰](http://www.ruanyifeng.com)
 
+授权：<a rel="license" href="http://creativecommons.org/licenses/by-nc/4.0/">署名-非商用许可证</a>
+
 ## 目录
 1. [ECMAScript 6简介](#docs/intro)