# Update Chain Specs in Parity Signer

In most cases, chain specs need to be scanned only when adding a new chain. However, you need to update them if the chain updates its address format, native token, or genesis hash.

Your **Parity Signer Device** is always offline and is air-gapped, so specs are updated via scanning a QR code. You can use the [Parity Technologies Metadata Portal](https://metadata.parity.io/#/kusama) or the [Nova Wallet Metadata Portal](https://metadata.novasama.io/) to find QR codes which will provide your **Parity Signer Device** with the information required to update the chain specs.

<table data-full-width="false"><thead><tr><th>Chain Description</th><th>Parity Technologies Metadata Portal</th><th>Nova Wallet Metadata Portal</th></tr></thead><tbody><tr><td>Polkadot / Kusama / Westend Relay Chains specs</td><td>Supported</td><td>Supported</td></tr><tr><td>Parachains, Solochains specs</td><td>Not Supported</td><td>Supported</td></tr></tbody></table>

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The following steps need to be carried out on your **Parity Signer Device**.
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1. Navigate to the appropriate metadata portal. Note: This should be done on a device which is **not** your Parity Signer Device.
2. `Select` the appropriate **blockchain** that you need to update the specs for.
3. `Select` the **Chain Specs** tab at the top of the metadata portal screen.
4. Using your Parity Signer Device, `Select` **Scan**.
5. Scan the **Chain Specs QR code** with your Parity Signer Device.
6. Review the verifier certificate and `Select` **Approve**.
7. If there was a metadata update as well, follow these steps next: [update-chain-metadata-in-parity-signer](https://docs.novawallet.io/nova-wallet-wiki/wallet-management/hardware-wallets/parity-signer/update-chain-metadata-in-parity-signer "mention").