The latest BIOS version is 67 (KYSKLi70.86A.0067.2020.0325.1553). It can be downloaded from here: https://downloadcenter.intel.com/download/29503/BIOS-Update-KYSKLi70-86A-?product=89187.
Now, going from BIOS 34 to BIOS 67 is an awfully big jump. I therefore recommend that you install this latest version using the BIOS Recovery method. Here is a quick process for doing so:
Hope this helps,