Upgrading the BC95-B20 module firmware version - Sixfab Raspberry Pi NB-IoT Shield

Hello,
I am using a Sixfab Raspberry Pi NB-IoT Shield I want to upgrade the BC95-B20 module firmware version.
How can I achieve that using Qflash while my shield is connected to raspberry pi 3 Model B? And will the upgrade cause any harm to the shield?
Any help is appreciated. Thanks!