Gemfile in undo-serializer-active_model-0.0.3 vs Gemfile in undo-serializer-active_model-0.0.4

@@ -5,18 +5,19 @@
 group :development do
   gem 'pry'
   platforms :ruby_19, :ruby_20 do
     gem 'pry-plus'
   end
+  gem "appraisal", github: "thoughtbot/appraisal"
 end
 
 group :test do
   gem "coveralls", require: false
 end
 
 group :test, :development do
   gem "rspec", ">= 3.0.0.beta1"
-  gem 'rails', '4.0.2'
+  gem 'activerecord', '>= 3.0.0'
   gem "activerecord-jdbcsqlite3-adapter", :platform => :jruby
   gem "sqlite3", :platform => [:ruby, :mswin, :mingw]
   gem 'factory_girl'
   gem 'faker'
   gem "active_model_serializers", "~> 0.8"