README.md in circleci-bundle-update-pr-1.2.2 vs README.md in circleci-bundle-update-pr-1.3.0

@@ -18,10 +18,14 @@
 
     $ gem install circleci-bundle-update-pr
 
 ## Usage
 
-    $ circleci-bundle-update-pr 'Git Usename' 'Git email address'
+    $ circleci-bundle-update-pr 'Git username' 'Git email address'
+
+By default, it works only on master branch, but you can also explicitly specify any branches rather than only master branch by adding them to the arguments.
+
+    $ circleci-bundle-update-pr 'Git username' 'Git email address' master develop topic
 
 ## Contributing
 
 1. Fork it ( https://github.com/masutaka/circleci-bundle-update-pr/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)