diff --git a/pica-mattermost/docker-compose.yml b/pica-mattermost/docker-compose.yml
index d9627f449cd592d59cabb39df0b489189ad81ab9..5838d709d10bd2b1ebeafcd38921db468617a15f 100644
--- a/pica-mattermost/docker-compose.yml
+++ b/pica-mattermost/docker-compose.yml
@@ -3,6 +3,7 @@ networks:
   proxy:
     external: true
   mattermost:
+    name: "mattermost"
 
 volumes:
   mattermost-config: