diff --git a/README.md b/README.md
index 8db64a63..f0c29f54 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,9 @@
 <p align="center">
     <b>OpenAPI/Swagger-generated API Reference Documentation</b>
 </p>
+<p align="center">
+  <b> This is README for `1.x` version of ReDoc. `2.x` README is on <a href="https://github.com/Rebilly/ReDoc">the master branch</a></b>
+</p>
 
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