diff --git a/README.md b/README.md
index 3985fc7..5aff4b6 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,11 @@ Supported ActiveRecord versions are
   * **4.1.x** series
   * **4.2.x** series
 
+If you are using ActiveRecord 2.3.x series you can use the gem version <
+2.0 like this
+
+    gem "activerecord-tableless", "~> 1.0.0"
+
 You may be able to make it work with 3.1.x, but you should expect to
 put some time in it.