diff --git a/watchtower/docker-compose.yml b/watchtower/docker-compose.yml
index b5325e5..290e4ce 100644
--- a/watchtower/docker-compose.yml
+++ b/watchtower/docker-compose.yml
@@ -13,7 +13,7 @@ services:
       - WATCHTOWER_REMOVE_VOLUMES=true
       - WATCHTOWER_INCLUDE_RESTARTING=true
       - WATCHTOWER_POLL_INTERVAL=7200
-      - WATCHTOWER_DISABLE_CONTAINERS='pihole atm3'
+      - WATCHTOWER_DISABLE_CONTAINERS="pihole atm3"
     env_file:
       - ../stack.env