diff --git a/services/speedtest-tracker/compose.yaml b/services/speedtest-tracker/compose.yaml
index 543b643..f7b99f8 100644
--- a/services/speedtest-tracker/compose.yaml
+++ b/services/speedtest-tracker/compose.yaml
@@ -57,7 +57,7 @@ services:
       - APP_KEY=
       - DB_CONNECTION=sqlite
       #- APP_NAME=
-      #- APP_URL=
+      - APP_URL= # Base URL used for notifications. example: speedtest.funny-name.ts.net
       #- APP_TIMEZONE=Europe/Amsterdam
       #- DISPLAY_TIMEZONE=Europe/Amsterdam
       #- PUBLIC_DASHBOARD=true
@@ -76,4 +76,4 @@ services:
       timeout: 10s # Time to wait for the check to succeed
       retries: 3 # Number of retries before marking as unhealthy
       start_period: 30s # Time to wait before starting health checks
-    restart: always
\ No newline at end of file
+    restart: always