diff --git a/README.md b/README.md
index 43801a7..c976d02 100644
--- a/README.md
+++ b/README.md
@@ -2,4 +2,8 @@
 
 [![NetMQ NuGet version](https://img.shields.io/nuget/v/NetMQ.svg)](https://www.nuget.org/packages/NetMQ/) [![NetMQ NuGet prerelease version](https://img.shields.io/nuget/vpre/NetMQ.svg)](https://www.nuget.org/packages/NetMQ/)
 
-Release branch, for more information about NetMQ go to https://github.com/zeromq/NetMQ
+This repo tracks version 3.x of NetMQ, which has been superceeded by version 4.x.
+
+Raise issues related to version 3.x here. Important fixes are cherry picked from 4.x, though new features and major work is applied only to 4.x. Users are recommended to update to version 4.x.
+
+For more information about NetMQ go to https://github.com/zeromq/NetMQ