%w(4.2 5.0 5.1 5.2).each do |version|
appraise "rails-#{version}" do
gem 'actionpack', "~> #{version}.0"
gem 'activerecord', "~> #{version}.0"
gem 'actionmailer', "~> #{version}.0"
gem 'activesupport', "~> #{version}.0"
gem 'railties', "~> #{version}.0"
end
end