appraise "rails-4-1" do
  gem 'railties', '~> 4.1'
  gem 'activesupport', '~> 4.1'
end

appraise "rails-4-2" do
  gem 'railties', '~> 4.2'
  gem 'activesupport', '~> 4.2'
end

appraise "rails-5-0" do
  gem 'railties', '~> 5.0'
  gem 'activesupport', '~> 5.0'
end