Question About update (need little help)

Hi Xda members,
a quick question from my side

My htc m7 at&t converted into developer edition
running android lollipop 5.0.2 Stock with software number 7.17.1540.21
with root, unlocked bootloader and custom recovery

so i got a little security update over wifi
and i need ask that can i run the update with above mentioned situation
last time i had same little update and i ran it and my cell was stuck at bootloop
what i need do for a safe update install so i dont have to wipe my cell with a reflash becuz i know maybe am again gona stuck at bootloop or update wont install

ty
this forum always helped me so good :)