diff --git a/docs/contributing-guide/environment-setup/ubuntu.md b/docs/contributing-guide/environment-setup/ubuntu.md
index 30269d35..cbfee3a1 100644
--- a/docs/contributing-guide/environment-setup/ubuntu.md
+++ b/docs/contributing-guide/environment-setup/ubuntu.md
@@ -27,6 +27,7 @@ sudo apt-get install software-properties-common
 sudo apt-add-repository -y ppa:rael-gc/rvm
 sudo apt-get update
 sudo apt-get install rvm
+sudo usermod -a -G rvm $USER
 ```
 
 Enable `Run command as a login shell` in terminal `Preferences`. Restart your computer.