appraise "rails4.2.x" do
  gem "railties", "~> 4.2.0"
end

appraise "rails5.x" do
  gem "railties", "~> 5.0"
end

appraise "sinatra1.x" do
  gem "sinatra", "~> 1.4"
end

appraise "sinatra2.x" do
  gem "sinatra", "~> 2.0"
end