Heroku + gunicorn not working (bash: gunicorn: command not found )

Heroku + gunicorn not working (bash: gunicorn: command not found )

Make sure gunicorn is in your requirements.txt

The issue seemed to fix itself after uninstalling all requirements remotely, and reinstalling them.

Heroku + gunicorn not working (bash: gunicorn: command not found )

I was missing the heroku/python buildpack
so I went to the dashboard and:

Settings -> Add buildpack -> heroku/python

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