diff --git a/README.md b/README.md
index 22eb01b..0d6a9ec 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ See [configuration example](config.example.json).
 ## Usage
 
 ```
-python3 main --help
+python3 main.py --help
 ```