diff --git a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2 b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
index 627a981..9a7969d 100644
--- a/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
+++ b/resources/chaosknoten/pretalx/docker_compose/compose.yaml.j2
@@ -15,9 +15,9 @@ services:
   redis:
     image: redis:latest
     restart: unless-stopped
-    volumes: 
+    volumes:
       - redis:/data
-  
+
   static:
     image: docker.io/library/nginx
     restart: unless-stopped
@@ -41,6 +41,7 @@ services:
       - "50"
       - "--log-level=info"
       - "--bind=0.0.0.0:8080"
+      - "--forwarded-allow-ips=172.18.0.1"
     ports:
       - 8080:8080
     restart: unless-stopped
@@ -64,7 +65,7 @@ services:
       PRETALX_LANGUAGE_CODE: de
       PRETALX_TIME_ZONE: Europe/Berlin
     volumes:
-      - pretalx:/data    
+      - pretalx:/data
       - public:/public
 
   celery:
@@ -96,7 +97,7 @@ services:
       PRETALX_LANGUAGE_CODE: de
       PRETALX_TIME_ZONE: Europe/Berlin
     volumes:
-      - pretalx:/data    
+      - pretalx:/data
       - public:/public
 
 volumes: