diff --git a/tools/default_packages_list.sh b/tools/default_packages_list.sh
index c763137..08f35f3 100644
--- a/tools/default_packages_list.sh
+++ b/tools/default_packages_list.sh
@@ -1 +1,3 @@
+#!/bin/bash
+
 export DEFAULT_PACKAGES_LIST="Puppet SystemConfig CiCdUtils OpenLDAP Gerrit Jenkins Zuul Nodepool ZuulNodepoolHelper CiCdEnvironment"