diff --git a/watchtower/docker-compose.yml b/watchtower/docker-compose.yml
index 69c068a..3221996 100644
--- a/watchtower/docker-compose.yml
+++ b/watchtower/docker-compose.yml
@@ -7,7 +7,7 @@ services:
       WATCHTOWER_LABEL_ENABLE: 'true'
       WATCHTOWER_LIFECYCLE_HOOKS: 'true'
       WATCHTOWER_NOTIFICATIONS: email shoutrrr
-      WATCHTOWER_NOTIFICATIONS_HOSTNAME: M-SERVER
+      WATCHTOWER_NOTIFICATIONS_HOSTNAME: ${WT_HOSTNAME:-M-SERVER}
       WATCHTOWER_NOTIFICATIONS_LEVEL: debug
       WATCHTOWER_NOTIFICATION_EMAIL_DELAY: '2'
       WATCHTOWER_NOTIFICATION_EMAIL_FROM: sectorq77@gmail.com