# Bootloader update 1.0 \> 1.1 via website fails

**URL:** <https://forum.electra.one/t/bootloader-update-1-0-1-1-via-website-fails/4475>\
**Category:** General discussion\
**Tags:** controller-firmware\
**Created:** [June 26, 2026, 7:48pm UTC](https://forum.electra.one/t/bootloader-update-1-0-1-1-via-website-fails/4475 "2026-06-26T19:48:47Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![schabtach](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.electra.one/schabtach/32/2114_2.png) [@schabtach](https://forum.electra.one/u/schabtach)\
**Post date:** [June 26, 2026, 7:48pm UTC](https://forum.electra.one/t/bootloader-update-1-0-1-1-via-website-fails/4475/1 "2026-06-26T19:48:47Z")

</div>

I’m trying to update the bootloader on my E1MkII. The web page gives an error message after the progress bar reaches 100% and the hardware shows “Validation failed”. I’ve tried two different web browsers, two different cables, and two different computers. Martin, as you may recall, this is a pretty old MkII. Thanks for your help.