diff --git a/README.md b/README.md
index d809e895b..4aad351a9 100755
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ SRS is a RTMP/HLS/WebRTC/SRT/GB28181 streaming cluster, high efficiency, stable
 ```
 git clone https://gitee.com/winlinvip/srs.oschina.git srs &&
 cd srs/trunk && git remote set-url origin https://github.com/ossrs/srs.git && 
-git checkout 3.0release && git pull
+git checkout 4.0release && git pull
 ```
 
 > Note: We use [mirrors(gitee)](#mirrors) here, but it's also ok to directly clone by `git clone https://github.com/ossrs/srs.git && cd srs/trunk`