Django gunicorn mistake?

pip freeze
    Django==1.11.7
    django-pagedown==0.1.3
    gunicorn==19.7.1
    Markdown==2.6.9

(venv) name@ubuntu:~/mysite$ ls
accounts  api_v0  boards  manage.py  mysite  posts  static  templates
(venv) name@ubuntu:~/mysite$ gunicorn --bind 0.0.0.0:8000 mysite.wsgi

Traceback (most recent call last):
        self.callable = self.load()
      File "/usr/local/lib/python3.6/dist-packages/gunicorn/app/wsgiapp.py", line 65, in load
        return self.load_wsgiapp()
      File "/usr/local/lib/python3.6/dist-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp
        return util.import_app(self.app_uri)
      File "/usr/local/lib/python3.6/dist-packages/gunicorn/util.py", line 352, in import_app
        __import__(module)
      File "/home/name/mysite/mysite/wsgi.py", line 16, in <module>
        application = get_wsgi_application()
      File "/usr/local/lib/python3.6/dist-packages/django/__init__.py", line 27, in setup
        apps.populate(settings.INSTALLED_APPS)
        return _bootstrap._gcd_import(name[level:], package, level)
    ModuleNotFoundError: No module named 'pagedown'