appraise 'rails40' do
  gem 'rails', '~> 4.0.12'
  gem 'sprockets', '~> 2'
end

appraise 'rails41' do
  gem 'rails', '~> 4.1.8'
  gem 'sprockets', '~> 2'
end

appraise 'rails42' do
  gem 'rails', '~> 4.2.0'
  gem 'sprockets', '~> 2'
end