diff --git a/inventories/z9/host_vars/dooris.yaml b/inventories/z9/host_vars/dooris.yaml
index 8ae5287..5813e3a 100644
--- a/inventories/z9/host_vars/dooris.yaml
+++ b/inventories/z9/host_vars/dooris.yaml
@@ -7,11 +7,9 @@ certbot__certificate_domains:
   - "dooris.ccchh.net"
 certbot__new_cert_commands:
   - "systemctl reload nginx.service"
+certbot__http_01_port: 80
 
 nginx__version_spec: ""
-nginx__deploy_redirect_conf: false
 nginx__configurations:
   - name: dooris.ccchh.net
     content: "{{ lookup('ansible.builtin.file', 'resources/z9/dooris/nginx/dooris.ccchh.net.conf') }}"
-  - name: http_handler
-    content: "{{ lookup('ansible.builtin.file', 'resources/z9/dooris/nginx/http_handler.conf') }}"
diff --git a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2 b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
index 2f6f990..2072ea2 100644
--- a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
@@ -78,7 +78,7 @@ services:
       - pretalx_net
 
   celery:
-    image: docker.io/pretalx/standalone:v2025.1.0
+    image: docker.io/pretalx/standalone:v2025.2.2
     command:
       - taskworker
     restart: unless-stopped
diff --git a/resources/z9/dooris/nginx/http_handler.conf b/resources/z9/dooris/nginx/http_handler.conf
deleted file mode 100644
index 8572664..0000000
--- a/resources/z9/dooris/nginx/http_handler.conf
+++ /dev/null
@@ -1,12 +0,0 @@
-server {
-    listen 80 default_server;
-    listen [::]:80 default_server;
-
-    location / {
-        return 301 https://$host$request_uri;
-    }
-
-    location /.well-known/acme-challenge/ {
-        proxy_pass http://127.0.0.1:31820/.well-known/acme-challenge/;
-    }
-}