Firmware Update - FAQ

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

  1. Close Chrome and all other applications (crypto wallets, Geth, Parity, Mist, Bitcoin Core, etc).
  2. Turn OFF VPN and anti-virus.
  3. Quit, reinstall and restart the Ledger Manager.
  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.

Is it mandatory to update my Nano S firmware?
Updating your Nano S to firmware 1.4 is strongly recommended, but there is no mechanism to force you to upgrade.

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

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 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 from 1.4 to 1.3.1?
No. For security reasons, it is not possible to downgrade the firmware of your Nano S.

How can I enter my 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 / left button until you reach a check mark (✓). Then, confirm your PIN code pressing both buttons.

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.

How many applications can I have on my Nano S with 1.4?
One of the user experience gains of the 1.4 firmware update is the possibility to install many more applications on the Nano S. The global limitation is related to the small amount of memory available on the device. The new firmware does not expand the memory, but optimizes the size of Bitcoin related applications.

Many cryptocurrency projects are clones of the Bitcoin blockchain that share most of the signature code (such as Bitcoin, Bitcoin Cash, Bitcoin Gold, Litecoin, Dogecoin, Dash, Zcash, Komodo, Stratis, Posw, Pivx, Viacoin, Vertcoin, Stealthcoin, Digibyte, Qtum, Hcash...). By refactoring all common codes in a library, hosted in the Bitcoin app, we were able to significantly reduce the size of the other apps. This enables the installation of up to 18 applications that share this library.

However, installing applications with a completely different code base will still limit the amount of apps to 4 or 5, for instance: Bitcoin, Ethereum, Ripple, FIDO U2F and Password Manager.

So, the types of applications installed lead to varying capacities. Most users may expect to see a capacity of 10 to 12 applications. 

Will I need my 24 word seed during the update?
Most users do not need to restore their Nano S after the update, and thus do not require access to their 24 word seed. The seed will only be wiped when updating a Nano S that currently has firmware version 1.3.1 or lower installed. You can check the current firmware version on your device before updating to 1.4.2.

However, make sure your 24 recovery words are properly backed-up and securely stored before starting the update.

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

Only users updating from firmware version 1.2 or lower will have their seed wiped during the process and will need to restore their 24 word seed after the update.

Always make sure your 24 recovery words are properly backed-up and securely stored before starting the update.

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

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

What if I am stuck on the Update message on my Nano S?
If your Nano S stays stuck displaying Update, and the Ledger Manager shows the message To begin, connect your Ledger Wallet, then:

  1. Disconnect your Ledger Nano S
  2. Quit and relaunch the Ledger Manager
  3. Reconnect the Ledger Nano S and unlock it by entering your PIN code
  4. Go to Step 4 of the update guide.


What to do with issues on Windows?

  1. Open the Device Manager from the Control Panel.
  2. Find the USB-device that has a yellow warning sign and right-click on it to select Update driver.
  3. After the driver has been updated, you can close and open Chrome browser, open Ledger Manager, connect your device and just wait.

If you are using Windows 7, you will have to finalize the update on another computer (not running Windows 7). We are working on a fix, but meanwhile this is the only option.

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 not 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.

Was this article helpful?
212 out of 519 found this helpful