diff --git a/README.md b/README.md
index 5fa02f026224f354e978101b0bb4dbfda25b0200..1de971be9dee3c70aa37a0abdd477494cd78b676 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Any of: aria2c / wget / curl
 
 1. Download this repo to anywhere.
 2. Modify `init.settings` and `runtime.settings`.
-3. Add `* * * * * /path/to/your/cron-callback.sh` into your crontab.
+3. Add `* * * * * bash /path/to/your/cron-callback.sh` into your crontab.
 
 ## Supported cloudimg