> For the complete documentation index, see [llms.txt](https://docs.novawallet.io/nova-wallet-wiki/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.novawallet.io/nova-wallet-wiki/wallet-management/hardware-wallets/polkadot-vault/update-chain-metadata-in-polkadot-vault.md).

# Update Chain Metadata in Polkadot Vault

Due to the fact that your **Polkadot Vault Device** is always offline and is air-gapped, there is a unique system in which you must partake to update the chain metadata so that your transactions are valid. You can use the [Novasama Technologies Metadata Portal](https://metadata.novasama.io/#/polkadot) to find QR codes which will provide your **Polkadot Vault Device** with the information required to update the chain metadata.

{% hint style="warning" %}
The following steps need to be carried out on your **Polkadot Vault Device**.
{% endhint %}

1. Navigate to the  [Novasama Technologies Metadata Portal](https://metadata.novasama.io/#/polkadot). Note: this should be done on a device which is **not** your Polkadot Vault device.
2. On the metadata portal, `select` the **blockchain** that you wish to update the metadata for.
3. If you are adding a chain for the first time, `select` the **Chain Specs** tab at the top of the metadata portal screen.
4. Using your Polkadot Vault device, `select` the **QR code scanner**.
5. Scan the **Chain specs QR code** with your Polkadot Vault device.
6. Review the verifier certificate and then `select` **Approve** at the bottom of the screen on your Polkadot Vault device.
7. `Select` the **Metadata** tab at the top of the metadata portal screen.
8. Using your Polkadot Vault device, `select` the **QR code scanner**.
9. Scan the **Metadata QR code** with your Polkadot Vault device. Note: this can take a few minutes to complete.
10. Review the verifier certificate and `select` **Approve**.


---

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