diff --git a/containers/zammad/docker-entrypoint.sh b/containers/zammad/docker-entrypoint.sh
index 6d84e9f..e4252c7 100755
--- a/containers/zammad/docker-entrypoint.sh
+++ b/containers/zammad/docker-entrypoint.sh
@@ -74,7 +74,7 @@ if [ "$1" = 'zammad-init' ]; then
     bundle exec rake db:seed
 
     # create autowizard.json on first install
-    if [ $((${#AUTOWIZARD_JSON} % 4)) -eq 0 ]; then
+    if base64 -d <<< ${AUTOWIZARD_JSON} &>> /dev/null; then
       echo "Saving autowizard json payload..."
       echo "${AUTOWIZARD_JSON}" | base64 -d > auto_wizard.json
     fi