title: ModuleNotFoundError: No module named 'geventwebsocket'
body: <p>Can't run my web-socket site on Heroku cloud with gunicorn. Locally ('heroku local') its working fine, but when i try to acess my site URL it gets crashed.</p>
  <p>Logs:</p>
  <blockquote>
  <p>2018-07-18T20:45:32.563241+00:00 app[web.1]: <strong>Error: class uri 'geventwebsocket.gunicorn.workers.GeventWebSocketWorker' invalid or not found:</strong></p>
  <p>2018-07-18T20:45:32.563242+00:00 app[web.1]:</p>
  <p>2018-07-18T20:45:32.563244+00:00 app[web.1]: [Traceback (most recent call last):</p>
  <p>2018-07-18T20:45:32.563246+00:00 app[web.1]: File &quot;/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py&quot;, line 132, in load_class</p>
  <p>2018-07-18T20:45:32.563247+00:00 app[web.1]: mod = import('.'.join(components))</p>
  <p>2018-07-18T20:45:32.563249+00:00 app[web.1]: <strong>ModuleNotFoundError: No module named 'geventwebsocket'</strong></p>
  <p>2018-07-18T20:45:32.563250+00:00 app[web.1]: ]</p>
  </blockquote>