Adding a chat app to an existing Django app on Heroku?

I have a fairly large Django project running on Heroku. I'm trying to add a chat app to a project, but as far as I can tell Heroku doesn't allow multiple ports to add a websocket. I also tried using Django feeds, but I didn't find any tutorials on how to add feeds to an existing project, so I struggled with that too. I am trying to avoid creating a new Heroku app to solve this problem. What are my options for adding a websocket to an existing Django app that will run on Heroku?