diff --git a/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2 b/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
index c2108d8..f359f47 100644
--- a/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/ccchoir/docker_compose/compose.yaml.j2
@@ -3,7 +3,7 @@
 
 services:
   database:
-    image: docker.io/library/mariadb:11
+    image: docker.io/library/mariadb:12
     environment:
       - "MARIADB_DATABASE=wordpress"
       - "MARIADB_ROOT_PASSWORD={{ secret__mariadb_root_password }}"
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index d24fa66..c5ef0ea 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -79,7 +79,6 @@ map $host $upstream_acme_challenge_host {
     staging.cryptoparty-hamburg.de 172.31.17.151:31820;
     staging.cryptoparty.hamburg.ccc.de 172.31.17.151:31820;
     spaceapi.ccc.de spaceapiccc.hosts.hamburg.ccc.de:31820;
-    cpuccc.hamburg.ccc.de 172.31.17.151:31820;
     cpu.ccc.de 172.31.17.151:31820;
     lokal.ccc.de 172.31.17.151:31820;
     local.ccc.de 172.31.17.151:31820;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
index 23e7240..a8b27fc 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -97,7 +97,6 @@ stream {
         staging.cryptoparty-hamburg.de 172.31.17.151:8443;
         staging.cryptoparty.hamburg.ccc.de 172.31.17.151:8443;
         spaceapi.ccc.de spaceapiccc.hosts.hamburg.ccc.de:8443;
-        cpuccc.hamburg.ccc.de 172.31.17.151:8443;
         cpu.ccc.de 172.31.17.151:8443;
         lokal.ccc.de 172.31.17.151:8443;
         local.ccc.de 172.31.17.151:8443;