diff --git a/README.md b/README.md
index d940df3..d60ef43 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,7 @@
 # Mail System
 Sends a mail with recent changes to [Webtrees](https://github.com/fisharebest/webtrees) users
+
+To use the plugin, you just have to add a cron task (replacing YOURWEBTREESSERVER by the url of your Webtrees installation)
+```
+0 0 * * 1 wget -O - -q "YOURWEBTREESSERVER/mail-sys/send"
+```