Note: If everything works fine with your keyboard. Please don’t update the firmware. There is a chance it can damage your keyboard.

Keychron K1 Firmware

Keychron K2 Firmware

Special firmware for K2

  

Keychron K4 Firmware

Keychron K6 Firmware

 

Keychron K8 Firmware

 

Special Instruction for Firmware Update (K2 and K4)