text: Title: Undeclared dependency on bs4
  Body: ```
    File "/home/rene/.virtualenvs/acceed-shop/lib/python3.5/site-packages/shop/models/notification.py", line 4, in <module>
      from bs4 import BeautifulSoup
  ```
  
  Add this to `setup.py` and check if it is declared in `requirements.txt`.