Redmine

We go to the page https://redmine.../login (with https).
After entering the username and password, the following page is returned to me: http://redmine.../my/page (http).

Redmine returns some requests like http, although it received like https.

In Nginx has a redirect configured from http to https, so there are no problems in the local network.
But for the incoming traffic, we must close port 80 in firewall. Is there any way to disable http in redmine?