diff --git a/new_version.sh b/new_version.sh
index 0d07377..693000f 100755
--- a/new_version.sh
+++ b/new_version.sh
@@ -4,7 +4,7 @@ set -ex
 
 stop=$1
 
-if [[ -z "$stop" ]]; then
+if [ -z "$stop" ]; then
     echo "stopping containers"
     docker stop chatbot webhook