diff --git a/utils/setup.sh b/utils/setup.sh
index 5ca89c3..e78567f 100644
--- a/utils/setup.sh
+++ b/utils/setup.sh
@@ -10,8 +10,10 @@ sudo apt update || fatal "something went wrong"
 sudo apt install "docker*" || fatal "something went wrong"
 
 echo "# check groups"
-groups | grep docker || sudo usermod $USER -aG docker
-fatal "please relog to enter docker group"
+if ! groups | grep docker; then 
+    sudo usermod $USER -aG docker
+    fatal "please relog to enter docker group"
+fi
 
 echo "# network"
 docker network create proxy