diff --git a/cce/vars b/cce/vars
index 7d0c1a3..df68aaf 100644
--- a/cce/vars
+++ b/cce/vars
@@ -7,6 +7,8 @@ SUPPORT_EMAIL=manoj.waikar@dkfz-heidelberg.de
 PRIVATEKEYFILENAME=/etc/bridgehead/pki/${SITE_ID}.priv.pem
 BROKER_URL_FOR_PREREQ=$BROKER_URL
 
+POSTGRES_TAG=15.6-alpine
+
 for module in $PROJECT/modules/*.sh
 do
     log DEBUG "sourcing $module"