diff --git a/README.md b/README.md
index ded25db..718ad47 100644
--- a/README.md
+++ b/README.md
@@ -68,10 +68,6 @@ lxc-destroy -n test-ubuntu
 ```
 
 
-```bash
-sudo add-apt-repository ppa:ubuntu-lxc/stable
-sudo add-apt-repository ppa:ubuntu-lxc/cgmanager-stable 
-```
 # auto start
 ## crontab
 ```bash