diff --git a/README.md b/README.md
index 92fd903..e981705 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ Now, modify the params in .env file as per your setup and run.
 ```
 pipenv shell
 pipenv install
-python ucloud-pay.py
+python ucloud_pay.py
 ```