diff --git a/inventories/chaosknoten/host_vars/lists.yaml b/inventories/chaosknoten/host_vars/lists.yaml
index 402bdce..2175571 100644
--- a/inventories/chaosknoten/host_vars/lists.yaml
+++ b/inventories/chaosknoten/host_vars/lists.yaml
@@ -5,7 +5,6 @@ certbot__version_spec: ""
 certbot__acme_account_email_address: j+letsencrypt-ccchh@jsts.xyz
 certbot__certificate_domains:
   - "lists.hamburg.ccc.de"
-certbot__http_01_port: 80
 
 nginx__version_spec: ""
 nginx__configurations:
diff --git a/inventories/chaosknoten/host_vars/mumble.yaml b/inventories/chaosknoten/host_vars/mumble.yaml
index bac0005..5545878 100644
--- a/inventories/chaosknoten/host_vars/mumble.yaml
+++ b/inventories/chaosknoten/host_vars/mumble.yaml
@@ -5,7 +5,6 @@ certbot__version_spec: ""
 certbot__acme_account_email_address: j+letsencrypt-ccchh@jsts.xyz
 certbot__certificate_domains:
   - "mumble.hamburg.ccc.de"
-certbot__http_01_port: 80
 
 nginx__version_spec: ""
 nginx__configurations:
diff --git a/playbooks/roles/nginx/files/redirect.conf b/playbooks/roles/nginx/files/redirect.conf
index 9ca67c8..b120666 100644
--- a/playbooks/roles/nginx/files/redirect.conf
+++ b/playbooks/roles/nginx/files/redirect.conf
@@ -7,4 +7,8 @@ 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/;
+    }
 }