README.md in contentful_middleman-3.0.1 vs README.md in contentful_middleman-4.0.0

@@ -4,13 +4,12 @@
 
 Contentful Middleman is a [Middleman](http://middlemanapp.com/) extension to use the Middleman static site generator together with the API-driven [Contentful CMS](https://www.contentful.com). It is powered by the [Contentful Ruby Gem](https://github.com/contentful/contentful.rb).
 
 Experience the power of Middleman while staying sane as a developer by letting end-users edit content in a web-based interface.
 
-> The main release works for Middleman v3 - The most used version
+> The main release works for Middleman v4 starting on version `4.0.0`.
 >
-> If you are using Middleman v4, consider trying out our [experimental branch](https://github.com/contentful/contentful_middleman/tree/dl/upgrade-to-v4).
-> Feel free to communicate with us if you are experiencing any bugs.
+> If you are using Middleman v3, use older releases. Latest stable release is `3.0.0`
 
 
 ## Installation
 Add the following line to the Gemfile of your Middleman project: