Update README.md

2016-08-11 10:42:13 -06:00 · 2016-08-11 10:42:13 -06:00 · 5245e28b08
--- a/README.md
+++ b/README.md
@ -31,7 +31,7 @@ curl -L bit.ly/nodejs-min | bash
 # Install LetsEncrypt

 ```bash
-npm install -g letsencrypt-cli
+npm install -g letsencrypt-cli@2.x
 ```

 ## Usage