README.md in nazrin-2.1.2 vs README.md in nazrin-2.2.0

@@ -2,11 +2,11 @@
 [![Gem Version](https://badge.fury.io/rb/nazrin.svg)](https://badge.fury.io/rb/nazrin)
 [![Build Status](https://travis-ci.org/tsuwatch/nazrin.svg?branch=master)](https://travis-ci.org/tsuwatch/nazrin)
 [![Coverage Status](https://coveralls.io/repos/tsuwatch/nazrin/badge.svg?branch=readme&service=github)](https://coveralls.io/github/tsuwatch/nazrin?branch=readme)
 [![Code Climate](https://codeclimate.com/github/tsuwatch/nazrin/badges/gpa.svg)](https://codeclimate.com/github/tsuwatch/nazrin)
 
-Nazrin is a Ruby wrapper for Amazon CloudSearch (aws-sdk), with optional ActiveRecord support for easy integration with your Rails application.
+Nazrin is a Ruby wrapper for Amazon CloudSearch (aws-sdk), with ActiveRecord, Mongoid support for easy integration with your Rails application.
 
 >*Nazrin has the ability of the extent which find what you're looking for...*
 
 ## Installation
 
@@ -42,11 +42,11 @@
 end
 ```
 
 ```ruby
 class Post < ActiveRecord::Base
-  include Nazrin::ActiveRecord::Searchable
+  include Nazrin::Searchable
 
   searchable do
     fields [:content]
     field(:created_at) { created_at.utc.iso8601 }
   end
@@ -64,9 +64,10 @@
 
 ### Supported pagination libraries
 If you want to use other supported pagination libraries, for example, `nazrin-kaminari` generates `Kaminari::PaginatableArray` instead of `Nazrin::PaginatedArray`.
 
 ```ruby
+gem 'nazrin'
 gem 'nazrin-kaminari'
 ```
 
 Currently supported libraries