Firmware Update - FAQ


How can I update my Ledger Nano S?
Please refer to our update guide for step by step instructions.

What if my Ledger Nano S displays MCU firmware is not genuine?
Try disconnecting and reconnecting the USB cable to continue. If the USB cable is not fully inserted, the authenticity check of the MCU will return this particular error during the startup process of the device.

What if my Ledger Nano S is stuck on Bootloader?
Please follow these steps:

  1. Close possibly interfering applications (antivirus, firewall, etc).
  2. Verify the left button of your device is not stuck.
  3. Disconnect your device.
  4. Uninstall and reinstall Ledger Live.
  5. Reboot your computer.
  6. Start Ledger Live and connect your Ledger nano S.
  7. Open the Manager and restart the firmware update process

What to do if I am stuck somewhere in the update?
Please carefully read the step by step instructions. Still having issues?

  1. Close Ledger Live and all other applications (crypto wallets, Geth, Parity, Mist, Bitcoin Core, etc).
  2. Turn OFF VPN and anti-virus.
  3. Quit, reinstall and restart Ledger Live.
  4. Change the USB-cable if possible.
  5. Restart the computer.
  6. Windows 7 users: please check the solutions at the bottom of this page.  
  7. Try another computer.

My PIN code had 4 digits. How to enter a short PIN code after the update?
If your PIN code includes less than 8 digits, please type in your PIN code as usual, and use the right or left button until you reach a checkmark (✓). Then, confirm your PIN code pressing both buttons.

What if I am stuck on the Update message on my Nano S?
If your Nano S stays stuck displaying Update, and the Manager does not detect your device:

  1. Disconnect your Ledger Nano S.
  2. Quit and restart Ledger Live and open the Manager.
  3. Connect and unlock your Ledger Nano S.
  4. Go to Step 4 of the update guide.

What to do with issues on Windows?

  1. Open Devices and Printers from Control Panel.
  2. Double-click Nano S and open the Hardware tab.
  3. Select USB Input Device and click Properties.
  4. Click Change Settings
  5. Click the Driver tab.
  6. Click Update driver and select automatic driver selection.
  7. Repeat this for both USB Input Devices.

If it still does not work, please try on a Mac to verify that your Ledger Nano S is working properly.

On other systems (Mac/Linux), if you are having trouble then the only solution is to try again.

The update server processes the download requests in a queue. The best is to wait when nothing seems to be happening. If it fails, then retry a few moments later. We thank you for your patience. 

If you are still having a hard time updating, make sure that no other applications are running on your computer (such as Parity, other crypto wallets or a firewall app). 

I have an issue that is described neither in the update guide nor in this FAQ article
Please contact our support team and describe your problem in as much detail as possible.

General questions

Is it mandatory to update my Ledger Nano S firmware?
Updating your Ledger Nano S is strongly recommended, but there is no mechanism to force you to upgrade.

What will happen if I do not update my Ledger Nano S?
We strongly recommend updating the firmware of your device. However, there are no significant consequences if you do not update your device at once. Ledger Live will notify you to update your device, but you are free to ignore them and the device will continue to work normally unless the update is required for new functionality.

What is this update for?
The update to firmware version 1.4.2 introduces user experience as well as minor security improvements. For more information regarding the specific changes, please refer to the blog post dedicated to this firmware release.

Do I have to upgrade my Ledger Nano S if I am not using it?
There is no necessity to install the firmware update immediately. It is no problem if you do not have immediate access to your device or if you do not plan to use it in the short term. You will always be able to update to the firmware later, whenever you decide to use your device. 

What exactly are the security vulnerabilities discovered? Should I be concerned?
Please refer to our blog post concerning the release of firmware version 1.4.2.

Is it possible to downgrade the firmware?
No. For security reasons, it is not possible to downgrade the firmware of your Ledger Nano S.

Why didn't my Ledger Nano S prompt to check the Identifier?   
As explained in step 5 of the update guide, the Ledger Nano S shows three screens after each other in a slider. If the right button is pressed before the other screens are shown, the firmware update will be installed before you could have checked the version number or the identifier. Please check that firmware version 1.4.2 and MCU version 1.5 are correctly installed.


Will I need my 24-word recovery phrase for the update?
No, starting from firmware version 1.3.1, firmware updates do not require the recovery phrase to be restored. However, as a precaution make sure your 24 recovery words are properly backed-up and securely stored before starting the update.

Could I lose my assets during this update?
Assets will not be at risk as long as the 24-word recovery phrase is properly backed-up and securely stored. Carefully follow the steps in the update guide.

Is this new version compatible with Ledger Blue, Nano, Unplugged or HW.1 devices?
No, this update only applies to Ledger Nano S devices.


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