diff --git a/crontab.example b/crontab.example
index fccbcd1..f089772 100644
--- a/crontab.example
+++ b/crontab.example
@@ -1 +1,3 @@
-* * * * * 
+# Updates the public IP log every 15 minutes
+# This assumes a container with name public-ip-monitor is kept
+*/15 * * * * docker exec public-ip-monitor /update