diff --git a/yggdrasil/README.md b/yggdrasil/README.md
index 81de7c6..8183ac7 100644
--- a/yggdrasil/README.md
+++ b/yggdrasil/README.md
@@ -1 +1,9 @@
-Yggdrasil I2P Reseed creator - bash script for creating reseed with Yggdrasil routers.
+# Yggdrasil I2P Reseed creator
+## bash script for creating reseed with Yggdrasil routers
+
+
+Also add `y2r.sh` to cron for automatically updating.
+Example:`/etc/cron.hourly/i2preseed`
+
+    #!/bin/bash
+    /path/to/y2r.sh