S4 mini 4.4.2 root (stock rom) topic

Hi guys,
I just installed the stock rom 4.4.2 for s4 mini, any method to root this new 4.4.2?
Before this i can root the 4.2.2 but for 4.4.2 after flashed the root kit the phone reboot
but after the s4 mini logo the phone just got blank. Why is it? Anyone can provide how to root
stock rom 4.4.2