diff --git a/install.sh b/install.sh
index 5b472db..e808cb6 100644
--- a/install.sh
+++ b/install.sh
@@ -9,7 +9,7 @@ if ! id | grep -q '(sudo)'
 then
   su -c "/usr/sbin/usermod -a -G sudo ${USER}"
   # use sudo group without 
-  newgrp sudo
+  exec sg sudo
 fi