diff --git a/__swarm/mailu3/mailu3-swarm.yml b/__swarm/mailu3/mailu3-swarm.yml
index 1b3d39c..86059c5 100644
--- a/__swarm/mailu3/mailu3-swarm.yml
+++ b/__swarm/mailu3/mailu3-swarm.yml
@@ -1,22 +1,22 @@
 networks:
   clamav:
-    driver: bridge
+    driver: overlay
   default:
-    driver: bridge
+    driver: overlay
     ipam:
       config:
       - subnet: 192.168.205.0/24
       driver: default
   fts_attachments:
-    driver: bridge
+    driver: overlay
     internal: true
   oletools:
-    driver: bridge
+    driver: overlay
     internal: true
   radicale:
-    driver: bridge
+    driver: overlay
   webmail:
-    driver: bridge
+    driver: overlay
 services:
   admin:
     dns: