appraise 'rails-3' do
  gem 'activesupport', '3.2.7'
  gem 'rails', '3.2.7'
  gem 'simple_form', '2.1.1'
end

appraise 'rails-4.0' do
  gem 'activesupport', '4.0.0'
  gem 'rails', '4.0.0'
  gem 'simple_form', '3.0.2'
end

appraise 'rails-4.1' do
  gem 'activesupport', '4.1.6'
  gem 'rails', '4.1.6'
  gem 'simple_form', '3.0.2'
end