diff --git a/README.md b/README.md
index f023a9c347..8f3f815063 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@
 
 A [RuboCop](https://github.com/rubocop-hq/rubocop) extension focused on enforcing Rails best practices and coding conventions.
 
+Note: This repository manages rubocop-rails gem (>= 2.0.0). rubocop-rails gem (<= 1.5.0) has been renamed to [rubocop-rails_config](https://rubygems.org/gems/rubocop-rails_config) gem.
+
 ## Installation
 
 Just install the `rubocop-rails` gem