appraise "rails-3.2" do
  gem "rails", "3.2.21"
end

appraise "rails-4.0" do
  gem "rails", "4.0.9"
end

appraise "rails-4.1" do
  gem "rails", "4.1.9"
end

appraise "rails-4.2" do
  gem "rails", "4.2.0"
end