diff --git a/install.sh b/install.sh
index 12699bd..c55b33e 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 and restart this script 
-  exec sg sudo -c bash $0
+  exec sg sudo -c "bash $0"
   exit $?
 fi