diff --git a/renovate.json b/renovate.json
index d36e7fef..2d0a9848 100644
--- a/renovate.json
+++ b/renovate.json
@@ -34,8 +34,8 @@
       "matchUpdateTypes": [
         "minor"
       ],
-      "excludePackageNames": [
-        "git.hamburg.ccc.de/ccchh/oci-images/keycloak"
+      "matchPackageNames": [
+        "!git.hamburg.ccc.de/ccchh/oci-images/keycloak"
       ]
     },
     {
diff --git a/resources/chaosknoten/lists/docker_compose/compose.yaml.j2 b/resources/chaosknoten/lists/docker_compose/compose.yaml.j2
index 7a109e8c..2d299ef8 100644
--- a/resources/chaosknoten/lists/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/lists/docker_compose/compose.yaml.j2
@@ -62,7 +62,7 @@ services:
       - POSTGRES_DB=mailmandb
       - POSTGRES_USER=mailman
       - "POSTGRES_PASSWORD={{ secret__lists__postgres_password }}"
-    image: docker.io/library/postgres:12-alpine
+    image: docker.io/library/postgres:13-alpine
     volumes:
       - /opt/mailman/database:/var/lib/postgresql/data
     networks: