diff --git a/bbmri/vars b/bbmri/vars
index 6db7dc1..f1ada17 100644
--- a/bbmri/vars
+++ b/bbmri/vars
@@ -7,7 +7,6 @@ BROKER_URL_FOR_PREREQ=$BROKER_URL
 
 OIDC_USER_GROUP="BBMRI_$(capitalize_first_letter ${SITE_ID})"
 OIDC_ADMIN_GROUP="BBMRI_$(capitalize_first_letter ${SITE_ID})_Verwalter"
-OIDC_PRIVATE_CLIENT_ID="BBMRI_${SITE_ID}-private"
 OIDC_PUBLIC_CLIENT_ID="BBMRI_${SITE_ID}-public"
 # Use "test-realm-01" for testing
 OIDC_REALM="${OIDC_REALM:-test-realm-01}"
@@ -15,6 +14,8 @@ OIDC_URL="https://login.verbis.dkfz.de"
 OIDC_ISSUER_URL="${OIDC_URL}/realms/${OIDC_REALM}"
 OIDC_GROUP_CLAIM="groups"
 
+POSTGRES_TAG=15.6-alpine
+
 # Makes sense for all European Biobanks
 : ${ENABLE_ERIC:=true}