diff --git a/docker_build_and_deploy.sh b/docker_build_and_deploy.sh
index aca8a24c..1a70d9e0 100755
--- a/docker_build_and_deploy.sh
+++ b/docker_build_and_deploy.sh
@@ -4,7 +4,7 @@ set -eo pipefail
 
 NAME=$1
 
-if [ -z $CIRCLE_TAG ];
+if [ ! -z $CIRCLE_TAG ];
 then
   VERSION=${CIRCLE_TAG#?}
 else