diff --git a/README.md b/README.md
index 59afaf5..2290fc2 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ pip install packaged
 ## Usage
 
 ```bash
-packaged <source_directory> <output_path> <build_command> <startup_command>
+packaged <output_path> <build_command> <startup_command> [<source_directory>]
 ```
 
 Such as: