BG96 (RAK5010) Firmware update

Issue: Would like to connect to my mqtt over ssl but I get an -1 failed to open network error, so I want to try it with the latest firmware for bg96.

Setup: RAK5010 with BG96,
current firmware version: BG96MAR02A08M1G_01.008.01.008

Details: where can I get the latest firmware so I can update over AT+QFOTAD ?