appraise 'rails-60' do git 'https://github.com/rails/rails.git' do gem 'actionpack', '~> 6.0.0.alpha' gem 'railties', '~> 6.0.0.alpha' end end appraise 'rails-52' do gem 'actionpack', '~> 5.2.0.beta2' gem 'railties', '~> 5.2.0.beta2' end appraise 'rails-51' do gem 'actionpack', '~> 5.1' gem 'railties', '~> 5.1' end appraise 'rails-50' do gem 'actionpack', '~> 5.0' gem 'railties', '~> 5.0' end appraise 'rails-42' do gem 'actionpack', '~> 4.2' gem 'railties', '~> 4.2' end