Gemfile in redis-actionpack-3.2.4 vs Gemfile in redis-actionpack-4.0.0

@@ -1,6 +1,16 @@
 source 'https://rubygems.org'
 gemspec
 
-if ::File.directory?(gem_path = '../redis-store')
-  gem 'redis-store', '~> 1.1.0', path: gem_path
+gem 'redis-store', '~> 1.1.0', path: '../redis-store'
+gem 'redis-rack',  '~> 1.5.0', path: '../redis-rack'
+
+version = ENV["RAILS_VERSION"] || "4"
+
+rails = case version
+when "master"
+  {:github => "rails/rails"}
+else
+  "~> #{version}.0"
 end
+
+gem "rails", rails