# Gemfile ruby '1.9.3'
This requires Bundler 1.2.0, which can be installed with the
gem install bundler --pre
You also need to move 'bin' to the beginning of your application's PATH so the correct Ruby binary is found when starting your web processes:
heroku config:add PATH=bin:vendor/bundle/ruby/1.9.1/bin:/usr/local/bin:/usr/bin:/bin --app YOU_APP_NAME
Commit the Gemfile changes and push to Heroku, and your app should be running under Ruby 1.9.3!