Help me to add an I9 9900 on Dell Optipplex 5060

i buy an Dell Optiplex 5060 (i5 8500, chipset Q370) and a processor I9 9900 (same TDP like I5 8500)
in the BIOS the I9 microcode is missing…but it is in the Optiplex 7070.
please i need a new BIOS !!! Please Please

Latest bios has support for 9Th (i3/5/7 but not 9 cpuID, still the microcode ID (0226EDEA) is the same already present)
This bios has Intel Boot Guard with RSA enable, almost sure that u cannot edit/flash a mod bios.
But u can wait for other opinions.