README.md in catarse_moip-1.0.9 vs README.md in catarse_moip-2.0.0

@@ -16,9 +16,15 @@
 
 Configure the routes for your Catarse application. Add the following lines in the routes file (config/routes.rb):
 
     mount CatarseMoip::Engine => "/", :as => "catarse_moip"
 
+## Rails 3.2.x and Rails 4 support
+
+If you are using the Rails 3.2.x on Catarse's code, you can use the version `1.0.0`.
+
+For Rails 4 support use the `2.0.0` version.
+
 ### Configurations
 
 Create this configurations into Catarse database:
 
     moip_uri, moip_token and moip_key