Deploying to heroku and getting "Push rejected, no Cedar-supported app detected" error

I am having a problem deploying to heroku and dont really see a clear answer. I can deploy the app to my dev server which is a box that I own and manage. However, When I push the code to heroku I get:

Push rejected, no Cedar-supported app detected

1. Went over package.json with a fine tooth comb to ensure that there is nothing missing including using http://ift.tt/1trBVkW until I get valid: true.

2 - Verified that my Procfile is included in the git commit and that it is set to the name of the app correctly.

3 - I also tried using heroku config:unset heroku config:unset BUILDPACK_URL as described here:

Heroku push rejected, no Cedar-supported app detected

This is a node app and my suspicion is that - for some reason that I dont see as of yet - heroku cant determine that it's a node app.

Any tips?