Xperia Z1 Lollipop root

'Ello! I wanted to ask, is there a way to root the Xperia Z1 C6903 Lollipop 5.1.1 without having to downgrade it to KitKat? Or is there a way for me to downgrade and then upgrade back to 5.1.1 without loosing the root?

Thanks for the replies in advance. :D