diff --git a/containers/zammad/docker-entrypoint.sh b/containers/zammad/docker-entrypoint.sh
index f6ccc0b..6f38d0e 100755
--- a/containers/zammad/docker-entrypoint.sh
+++ b/containers/zammad/docker-entrypoint.sh
@@ -152,7 +152,7 @@ if [ "$1" = 'zammad-railsserver' ]; then
   echo "starting railsserver... with WEB_CONCURRENCY=${ZAMMAD_WEB_CONCURRENCY}"
 
   #shellcheck disable=SC2101
-  exec bundle exec rails server puma -b [::] -p "${ZAMMAD_RAILSSERVER_PORT} ${PUMA_OPTS}" -e "${RAILS_ENV}"
+  exec bundle exec puma -b [::]:"${ZAMMAD_RAILSSERVER_PORT}" ${PUMA_OPTS} -e "${RAILS_ENV}"
 fi