add beta note
@@ -3,10 +3,20 @@ SublimeLinter
[![Build Status](https://img.shields.io/travis/SublimeLinter/SublimeLinter/master.svg)](https://travis-ci.org/SublimeLinter/SublimeLinter)
+A framework for interactive code linting in [Sublime Text 3](http://sublimetext.com/3).
-## About SublimeLinter
-A framework for interactive code linting in [Sublime Text 3](http://sublimetext.com/3).
+## SublimeLinter 4 beta
+
+We're making big improvements to how SublimeLinter works. You can read more about it [here](https://raw.githubusercontent.com/SublimeLinter/SublimeLinter/master/messages/4.0.0-rc.1.txt).
+
+Participate in the beta right now by editing your Package Control preferences and adding SublimeLinter to the "install_prereleases" key:
+```json
+"install_prereleases":
+[
+ "SublimeLinter"
+]
+```
## Key Bindings
