[Q] updated to 5.0 ROM, lost root topic

Hi everybody!

I recently updatet my formerly rootet G2 (D802) to Android 5.0 (OmniROM). My Problem is that I somehow lost root and I'm wondering how I can restore root on the phone with 5.0 installed.

I didn't find any links/howtos or tips to do so under 5.0 so is anyone here who can give me a little piece of advice?

Thanks!