diff --git a/resources/chaosknoten/auth-dns/zones/ccchh.net.zone b/resources/chaosknoten/auth-dns/zones/ccchh.net.zone
index 813743be..2ba51355 100644
--- a/resources/chaosknoten/auth-dns/zones/ccchh.net.zone
+++ b/resources/chaosknoten/auth-dns/zones/ccchh.net.zone
@@ -53,7 +53,7 @@ hmdooris-ccu   A    172.31.200.17
 
 club-assistant                  AAAA  2a07:c481:1:d0::a
                                 A     10.31.208.10
-_acme-challenge.club-assistant  CNAME d50ad73a-f82d-4244-87f0-6f5195b37d21.auth.acmedns.hamburg.ccc.de
+_acme-challenge.club-assistant  CNAME d50ad73a-f82d-4244-87f0-6f5195b37d21.auth.acmedns.hamburg.ccc.de.
 ;esphome                        AAAA  2a07:c481:1:d0::66
 ;zigbee2mqtt                    A     185.161.129.132
 ;light                          AAAA  2a07:c481:1:d0::16
diff --git a/resources/chaosknoten/lists/docker_compose/compose.yaml.j2 b/resources/chaosknoten/lists/docker_compose/compose.yaml.j2
index db605b57..24c686b4 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: