diff --git a/mattermost/docker-compose.yaml b/mattermost/docker-compose.yaml
index f0f8f60..8ebe8db 100644
--- a/mattermost/docker-compose.yaml
+++ b/mattermost/docker-compose.yaml
@@ -23,7 +23,7 @@ volumes:
 
 services:
   mattermost:
-    image: mattermost/mattermost-team-edition:6.7
+    image: mattermost/mattermost-team-edition:7.0
     container_name: mattermost
     environment:
       MM_USERNAME: ${ADMIN_USER}
@@ -31,6 +31,7 @@ services:
       MM_DBNAME: ${DB_NAME}
       DB_HOST: mattermost-db
       DB_PORT_NUMBER: 5432
+      MM_SERVICESETTINGS_SITEURL: https://cs-mm.ddnss.de
     restart: unless-stopped
     networks:
       - proxy