README.md in second_level_cache-2.6.3 vs README.md in second_level_cache-2.6.4

@@ -2,24 +2,24 @@
 
 [![Gem Version](https://badge.fury.io/rb/second_level_cache.svg)](http://badge.fury.io/rb/second_level_cache)
 [![Build Status](https://travis-ci.org/hooopo/second_level_cache.svg?branch=master)](https://travis-ci.org/hooopo/second_level_cache)
 [![Code Climate](https://codeclimate.com/github/hooopo/second_level_cache.svg)](https://codeclimate.com/github/hooopo/second_level_cache)
 
-SecondLevelCache is a write-through and read-through caching library inspired by Cache Money and cache_fu, support ActiveRecord 4.
+SecondLevelCache is a write-through and read-through caching library inspired by Cache Money and cache_fu, support ActiveRecord 4, ActiveRecord 5 and ActiveRecord 6.
 
 Read-Through: Queries by ID, like `current_user.articles.find(params[:id])`, will first look in cache store and then look in the database for the results of that query. If there is a cache miss, it will populate the cache.
 
 Write-Through: As objects are created, updated, and deleted, all of the caches are automatically kept up-to-date and coherent.
 
 
 ## Install
 
 In your gem file:
 
-ActiveRecord 5.2:
+ActiveRecord 5.2 and 6.0:
 
 ```ruby
-gem 'second_level_cache', '~> 2.4.0'
+gem 'second_level_cache', '~> 2.6.3'
 ```
 
 ActiveRecord 5.0.x, 5.1.x:
 
 ```ruby