diff --git a/docker-compose.yml b/docker-compose.yml
index 79f06db..2d9b961 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -8,10 +8,10 @@ services:
     command: --interval 30
     restart: unless-stopped
     environment:
-      - WATCHTOWER_NOTIFICATION_SLACK_CHANNEL="#alerts"
-      - WATCHTOWER_NOTIFICATION_SLACK_HOOK_URL="https://hooks.slack.com/services/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"
+      - WATCHTOWER_NOTIFICATION_SLACK_CHANNEL=#alerts
+      - WATCHTOWER_NOTIFICATION_SLACK_HOOK_URL=https://hooks.slack.com/services/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
       - WATCHTOWER_NOTIFICATION_SLACK_IDENTIFIER=${HOSTNAME}
-      - WATCHTOWER_NOTIFICATIONS="slack"
+      - WATCHTOWER_NOTIFICATIONS=slack
       - WATCHTOWER_POLL_INTERVAL=60
       - WATCHTOWER_RUN_ONCE=false
       - WATCHTOWER_WARN_ON_HEAD_FAILURE=never