README.md in mailkick-0.3.1 vs README.md in mailkick-0.4.0

- old
+ new

@@ -201,9 +201,15 @@
 
 ```ruby
 user.opt_in
 ```
 
+Access the opt-out model directly
+
+```ruby
+Mailkick::OptOut.all
+```
+
 ## History
 
 View the [changelog](https://github.com/ankane/mailkick/blob/master/CHANGELOG.md)
 
 ## Contributing