README.md in lookbook-0.9.2 vs README.md in lookbook-0.9.3

@@ -800,9 +800,17 @@
 
 ```ruby
 config.lookbook.listen_paths << Rails.root.join('app/other/directory')
 ```
 
+By default Lookbook listens for changes to files with the extensions `rb` and `html.*` (i.e. `.html.erb`).
+
+You can add additional extensions by using the `listen_extensions` option:
+
+```ruby
+config.lookbook.listen_extensions = ['js', 'scss'] # Will not overwrite default extensions
+```
+
 ### Custom favicon
 
 If you want to change the favicon used by the Lookbook UI, you can provide a path to your own (or a data-uri string) using the `ui_favicon` option:
 
 ```ruby