diff --git a/compose.yml b/compose.yml
index 9ae42da..83582f6 100644
--- a/compose.yml
+++ b/compose.yml
@@ -91,13 +91,12 @@ services:
 
   grampsweb:
     image: ghcr.io/gramps-project/grampsweb:latest
-    ports:
-      - "8090:80"
     environment:
       - GRAMPSWEB_SECRET_KEY=${GRAMPSWEB_SECRET_KEY}
       - GRAMPSWEB_ADMIN_EMAIL=${GRAMPSWEB_ADMIN_EMAIL}
       - GRAMPSWEB_ADMIN_PASSWORD=${GRAMPSWEB_ADMIN_PASSWORD}
       - GRAMPSWEB_TREE=${GRAMPSWEB_TREE:-Stiftung}
+      - GRAMPSWEB_BASE_URL=/ahnenforschung
     volumes:
       - gramps_data:/app/data
     depends_on: