diff --git a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2 b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
index 0bbfcb8..78dba42 100644
--- a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
@@ -33,7 +33,7 @@ services:
       - pretalx_net
 
   pretalx:
-    image: docker.io/pretalx/standalone:v2025.1.0
+    image: docker.io/pretalx/standalone:v2025.2.3
     entrypoint: gunicorn
     command:
       - "pretalx.wsgi"
@@ -78,7 +78,7 @@ services:
       - pretalx_net
 
   celery:
-    image: docker.io/pretalx/standalone:v2025.1.0
+    image: docker.io/pretalx/standalone:v2025.2.3
     command:
       - taskworker
     restart: unless-stopped
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index 3bcd0fb..5b9fa94 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -4,6 +4,8 @@ map $host $upstream_acme_challenge_host {
     c3cat.de 172.31.17.151:31820;
     www.c3cat.de 172.31.17.151:31820;
     staging.c3cat.de 172.31.17.151:31820;
+    c3dog.de 172.31.17.151:31820;
+    www.c3dog.de 172.31.17.151:31820;
     ccchoir.de ccchoir.hosts.hamburg.ccc.de:31820;
     www.ccchoir.de ccchoir.hosts.hamburg.ccc.de:31820;
     cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:31820;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
index 01edbfe..47b0c29 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -49,6 +49,8 @@ stream {
         c3cat.de 172.31.17.151:8443;
         www.c3cat.de 172.31.17.151:8443;
         staging.c3cat.de 172.31.17.151:8443;
+        c3dog.de 172.31.17.151:8443;
+        www.c3dog.de 172.31.17.151:8443;
         git.hamburg.ccc.de 172.31.17.154:8443;
         eh03.easterhegg.eu 172.31.17.151:8443;
         eh05.easterhegg.eu 172.31.17.151:8443;