Как решить ModuleNotFoundError: нет модуля с именем «social_django» при развертывании в Heroku?

У меня есть приложение Django, которое работает на LocalHost, но когда я пытаюсь развернуть Heroku, я получаю эту ошибку ModuleNotFoundError: нет модуля с именем «social_django». У меня есть это для моего settings.py, я установил social-auth-app-django через pip3. Я также запускал manage.py migrate без проблем.

INSTALLED_APPS = [
'django.contrib.admin',  
'django.contrib.auth',  
'django.contrib.contenttypes',  
'django.contrib.sessions',  
'django.contrib.messages',  
'django.contrib.staticfiles',  
'whitenoise.runserver_nostatic',  
'crispy_forms',  
'social_django',  
]  
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'whitenoise.middleware.WhiteNoiseMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'social_auth.middleware.SocialAuthExceptionMiddleware',  
]
TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'social_django.context_processors.backends',
                'social_django.context_processors.login_redirect',
            ],
        },
    },
]  
AUTHENTICATION_BACKENDS = [
    'social_core.backends.twitter.TwitterOAuth',
    'social_core.backends.facebook.FacebookOAuth2',
    'django.contrib.auth.backends.ModelBackend',
]
STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles') # new!
STATIC_URL = '/static/'
STATICFILES_DIRS = [os.path.join(BASE_DIR, 'static')]
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'  

pip freeze возвращает следующий соответствующий материал

social-auth-app-django==2.1.0
social-auth-core==1.7.0

heroku logs возвращается

 app[web.1]: [2018-09-19 22:58:32 +0000] [10] [ERROR] Exception in worker process
 app[web.1]: Traceback (most recent call last):
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
 app[web.1]: self.load_wsgi()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 129, in init_process
 app[web.1]: worker.init_process()
 app[web.1]: self.wsgi = self.app.wsgi()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
 app[web.1]: self.callable = self.load()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py", line 67, in wsgi
 app[web.1]: return self.load_wsgiapp()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py", line 350, in import_app
 app[web.1]: return util.import_app(self.app_uri)
 app[web.1]: __import__(module)
 app[web.1]: File "/app/smash_feed_project/wsgi.py", line 16, in <module>
 app[web.1]: application = get_wsgi_application()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-

packages/django/core/wsgi.py", line 12, in get_wsgi_application
Traceback (most recent call last):
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
 app[web.1]: worker.init_process()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 129, in init_process
 app[web.1]: self.load_wsgi()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
 app[web.1]: self.wsgi = self.app.wsgi()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py", line 67, in wsgi
 app[web.1]: self.callable = self.load()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
 app[web.1]: return self.load_wsgiapp()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
 app[web.1]: return util.import_app(self.app_uri)
 app[web.1]: __import__(module)
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py", line 350, in import_app

 app[web.1]: application = get_wsgi_application()
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/core/wsgi.py", line 12, in get_wsgi_application
 app[web.1]: django.setup(set_prefix=False)
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
 app[web.1]: apps.populate(settings.INSTALLED_APPS)
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/apps/registry.py", line 89, in populate
 app[web.1]: app_config = AppConfig.create(entry)
 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/apps/config.py", line 90, in create
 app[web.1]: module = import_module(entry)
 app[web.1]: File "/app/.heroku/python/lib/python3.6/importlib/__init__.py", line 126, in import_module
 app[web.1]: return _bootstrap._gcd_import(name[level:], package, level)
 app[web.1]: ModuleNotFoundError: No module named 'social_django'
 app[web.1]: [2018-09-19 22:58:32 +0000] [11] [INFO] Worker exiting (pid: 11)
 app[web.1]: [2018-09-19 22:58:32 +0000] [4] [INFO] Shutting down: Master
 app[web.1]: [2018-09-19 22:58:32 +0000] [4] [INFO] Reason: Worker failed to boot.
 heroku[web.1]: Process exited with status 3
 heroku[web.1]: State changed from up to crashed
 app[api]: Build succeeded

Прошу прощения за длину логов героку. Я пробовал несколько разных вещей, которые нашел в stackoverflow, но безрезультатно. Я даже пытался отменить свои коммиты и повторить шаги для развертывания в Heroku. Я все еще получаю ту же ошибку.

РЕДАКТИРОВАТЬ: добавлен мой файл pip ниже

[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"

[packages]
django = "*"
django-crispy-forms = "*"
gunicorn = "*"
whitenoise = "*"


[dev-packages]
pylint = "*"

[requires]
python_version = "3.6"