diff --git a/mattermost/.env b/mattermost/.env
index b018d13..eb7c4b0 100644
--- a/mattermost/.env
+++ b/mattermost/.env
@@ -1,7 +1,7 @@
 TUNNEL_TOKEN=
 
 # Domain of service
-DOMAIN=erratic.cc
+DOMAIN=
 
 # Container settings
 ## Timezone inside the containers. The value needs to be in the form 'Europe/Berlin'.