appraise "rails-3-2" do
  gem "rails", "~> 3.2.21"
end

appraise "rails-4-0" do
  gem "rails", "~> 4.0.12"
end

appraise "rails-4-1" do
  gem "rails", "~> 4.1.8"
end

appraise "rails-4-2" do
  gem "rails", "~> 4.2.0"
end