XPS 13 9370, Bios Update Fails

Hi,

I want to update my (brand new) laptop’s bios from version 1.5.1 to 1.6.3. However, the update fails. After running the exe-file, it seems like the update progresses like it should. However, then the system restarts without flashing the bios.

 I tried:

• Updating the bios directly from a USB memory device (using F12 at startup) – Same problem, bios version (1.5.1) remains unchanged
• Downgrading to a previous version (1.4.0.) – Same problem, bios version (1.5.1) remains unchanged

Any Ideas?