appraise "activesupport-3.2" do
  gem "activesupport", "~> 3.2.0"
end

appraise "activesupport-4.0" do
  gem "activesupport", "~> 4.0.0"
end

appraise "activesupport-4.1" do
  gem "activesupport", "~> 4.1.0"
end

appraise "activesupport-4.2" do
  gem "activesupport", "~> 4.2.0.beta4"
end