appraise 'activesupport30' do gem 'activesupport', '~> 3.0.0' end appraise 'activesupport31' do gem 'activesupport', '~> 3.1.0' end appraise 'activesupport32' do gem 'activesupport', '~> 3.2.0' end appraise 'activesupport40' do gem 'activesupport', :github => 'rails/rails' end