I'm getting this error on app engine using flask to make a Slack bot. It happens whenever I send a POST request from Slackbot.

Unfortunately, the url provided in the error is a dead link. How do I go about using sockets instead of URLFetch?

> 
> /base/data/home/apps/[REDACTED]/lib/requests/packages/urllib3/contrib/appengine.py:115:
>  AppEnginePlatformWarning: urllib3 is using URLFetch on Google App
>  Engine sandbox instead of sockets. To use sockets directly instead of
>  URLFetch see <https://urllib3.readthedocs.io/en/latest/contrib.html>.
> 
> 
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