Fix SSL warnings in heroku

[ccooper]

2020-12-14T16:59:13.143847+00:00 app[web.1]: /app/.heroku/python/lib/python3.9/site-packages/urllib3/connectionpool.py:1013: InsecureRequestWarning: Unverified HTTPS request is being made to host 'XXX'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings