diff --git a/README_EN.md b/README_EN.md
index 257ad5a..3b72101 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -68,7 +68,7 @@ docker run --name pingtunnel-client -d --restart = always -p 1080: 1080 esrrhs /
 # Test
 Test the acceleration effect of pingtunnel. The server is located in aws Korea and the client is located in mainland China.
 
-download the centos image [centos mirror](http://mirror.calgah.com/centos/8/isos/x86_64/CentOS-8-x86_64-1905-dvd1.iso) , the results of direct wget, shadowsocks wget, and pingtunnel wget are as follows.
+download the centos image [centos mirror](http://mirror.calgah.com/centos/8/isos/x86_64/CentOS-8.1.1911-x86_64-dvd1.iso) , the results of direct wget, shadowsocks wget, and pingtunnel wget are as follows.
 
 |              | wget     | shaowsocks | pingtunnel |
 |--------------|----------|------------|------------|