diff --git a/README.md b/README.md
index 4477d6ef..9416cf04 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,7 @@
 - [HTTP](https://github.com/CyC2018/CS-Notes/blob/master/docs/notes/HTTP.md)
 - [Socket](https://github.com/CyC2018/CS-Notes/blob/master/docs/notes/Socket.md)
 
-### :couple: 面向对象
+### :unlock: 面向对象
 
 - [设计模式](https://github.com/CyC2018/CS-Notes/blob/master/docs/notes/设计模式.md)
 - [面向对象思想](https://github.com/CyC2018/CS-Notes/blob/master/docs/notes/面向对象思想.md)