Gem name is 'passenger'. See the documentation for installation instructions. Example Procfile configuration: https://github.com/phusion/passenger-ruby-heroku-

Gem name is 'passenger'. See the documentation for installation instructions. Example Procfile configuration: https://github.com/phusion/passenger-ruby-heroku-demo https://github.com/phusion/passenger-ruby-heroku-demo. Note that the demo locks down to Phusion Passenger 4 by default. If you want to try 5, don't forget to bump the version number in the Gemfile.