appraise 'activemodel-3.0' do
  gem 'activemodel', '3.0.20'
end

appraise 'activemodel-3.1' do
  gem 'activemodel', '3.1.12'
end

appraise 'activemodel-3.2' do
  gem 'activemodel', '3.2.18'
end

appraise 'activemodel-4.0' do
  gem 'activemodel', '4.0.10'
end

appraise 'activemodel-4.1' do
  gem 'activemodel', '4.1.6'
end

appraise 'activemodel-4.2' do
  gem 'activemodel', '4.2.3'
end