User manual:Updating the Trezor device firmware

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Trezor Wiki/User/User manual/ Updating the Trezor device firmware

The purpose of this guide is to help the user to update the Trezor device firmware. This page applies to Trezor One (show for Trezor Model T).

Updating the device firmware is often the only way to expand the functionality of your Trezor, to apply new security measures, and to enable newly developed features.

When a new firmware version is released, the Trezor Wallet will display an easily noticeable bar in the upper part of the wallet interface.

User-manual updateneeded.png

Clicking the Show details button allows you to review the changes brought with the update and displays instructions asking you to connect the device in bootloader mode.

NoteTo check your current firmware version, enter the bootloader mode (see below) or go to the Advanced settings in Trezor Wallet. To see the firware changelog, see Trezor firmware changelog.

1. Entering the bootloader mode[edit]

Connect your Trezor while using your index and middle finger to hold both buttons pressed.

T1 firmware update.png

2. Updating the firmware[edit]

ImportantBefore the firmware update, make sure to have your recovery seed available in case you need to immediately recover your wallet. Some firmware updates delete the memory of your device. You can check the validity of your seed at any time by doing the Dry-run recovery

When in bootloader mode, read the instructions and warnings carefully and check the respective box to enable the Update my device button. Confirm the update on your device and let the Trezor update the firmware.

User-manual trezor-bootloader.jpg
ImportantYour Trezor will wipe itself if the device loses connection while loading the new firmware. This can sometimes happen due to a faulty or disconnected cable. In such case, reconnect your Trezor and repeat the whole process. Prepare to recover your accounts afterwards.

After your device loads the new firmware, it will ask you to compare the firmware's fingerprint. Make sure this string of letters and numbers displayed on your device's screen matches what is displayed in your browser and finish the update by confirming this on your device.

Do not hesitate to contact us via Support center if you encounter any unexpected behavior, notifications, or warnings during the update process.

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