Gemfile in jsonapi-resources-0.2.0 vs Gemfile in jsonapi-resources-0.3.0.pre1

@@ -8,13 +8,15 @@
 
 platforms :jruby do
   gem 'activerecord-jdbcsqlite3-adapter'
 end
 
-version = ENV['RAILS_VERSION'] || '4.0.4'
+version = ENV['RAILS_VERSION'] || 'default'
 rails = case version
         when 'master'
           {:github => 'rails/rails'}
+        when 'default'
+            '>= 4.2'
         else
           "~> #{version}"
         end
 gem 'rails', rails