Django redirecting http -> https

I am running:

python manage.py runserver localhost:44100

And this is redirecting me to https:

» http http://localhost:44100/HTTP/1.0 301 Moved PermanentlyContent-Type: text/html; charset=utf-8Date: Mon, 05 Mar 2018 14:09:09 GMTLocation: https://localhost:44100/Server: WSGIServer/0.1 Python/2.7.14X-Frame-Options: SAMEORIGIN

Why / how is this happening? What setting does control whether Django accepts http / https?