appraise "rails3" do
  gem "activerecord", "~> 3.2.0"
  gem "activesupport", "~> 3.2.0"
  gem "railties", "~> 3.2.0"
end

appraise "rails40" do
  gem "activerecord", "~> 4.0.0"
  gem "activesupport", "~> 4.0.0"
  gem "railties", "~> 4.0.0"
end

appraise "rails41" do
  gem "activerecord", "~> 4.1.0"
  gem "activesupport", "~> 4.1.0"
  gem "railties", "~> 4.1.0"
end