diff --git a/docker-compose.yml b/docker-compose.yml
index 533174b..ccb81c4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,6 +14,7 @@ services:
       - /var/lib/docker/volumes/dms/mail-state/:/var/mail-state/
       - /var/lib/docker/volumes/dms/mail-logs/:/var/log/mail/
       - /var/lib/docker/volumes/dms/config/:/tmp/docker-mailserver/
+      - /var/lib/docker/volumes/hawser_stacks/_data/mailserver:/tmp/install/
       - /etc/localtime:/etc/localtime:ro
     environment:
       - TZ=Europe/Paris