Using ip-adress in the intranet

HI I just einstalled yunohost on my raspi2.
Everything works out pretty fine but I have one problem:
When I try to connect to my yunohost-apps from within my home-network I need to use the internal ip-adress of the Pi, since my router doesn’t permit connections via url. But whenever I enter the ip-adress into the browser i get redirected to the admin-login.
is there any way to change that redirection?