diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,8 +1,19 @@
 # unbundle
 
 unbundle parses bundle and pundle definition files to recursively resolve
-a complete list of all packages in a bundle. The usage for unbundle is
+a complete list of all packages in a bundle.
 
-unbundle bundle-name path/to/clr-bundles/repo
+```
+usage: unbundle [-h] bundle_name bundle_path
+
+Process bundle packages following includes
+
+positional arguments:
+  bundle_name  name of bundle to process
+  bundle_path  path to clr-bundles directory
+
+optional arguments:
+  -h, --help   show this help message and exit
+```
 
 unbundle prints a sorted list of all included packages.