# Update network metadata

Given that your Polkadot Vault device is always offline and separated from any networks (air-gapped), you'll need to engage in a specific process to ensure your transactions remain valid by updating the chain metadata.

This can be done through the use of QR codes found on the [Novasama Metadata Portal](https://metadata.novasama.io/#/polkadot), which will provide your device with the information required to update the chain metadata.

To update the chain metadata, please follow the instructions below:

{% hint style="info" %}
Please look at the following example for your perusal. Here, we are updating the metadata of the Avail network.
{% endhint %}

**Step 1**: Navigate to the [Novasama Metadata Portal](https://metadata.novasama.io/#/polkadot). The interface should be like the image below.

{% hint style="info" %}
This should be done on a device that is **not** your Polkadot Vault device (PC recommended).
{% endhint %}

In this case, we are using a PC.

<figure><img src="https://631687399-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Lh39Kwxa1xxZM9WX_Bs%2Fuploads%2FL1PDCNoOOZv83jC2nyNG%2Fimage.png?alt=media&#x26;token=aa245f07-3a15-4ddc-b41a-e321ae0be3e8" alt=""><figcaption></figcaption></figure>

**Step 2**: Choose the network you want to add in the **Network** tab on the sidebar.&#x20;

<figure><img src="https://631687399-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Lh39Kwxa1xxZM9WX_Bs%2Fuploads%2FzdjDQ8hTnQgQsttlswHS%2Fimage.png?alt=media&#x26;token=d0e025a3-c01b-49af-9012-1482c5162895" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
To make it easier, type the network you want to update in the **Search** bar.

*In this case, we want to add the Mythos network.*

![](https://631687399-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Lh39Kwxa1xxZM9WX_Bs%2Fuploads%2FgX87YE7GA2XL9AniLNDc%2Fimage.png?alt=media\&token=85e23185-0bda-4828-b7aa-afc9de87feef)
{% endhint %}

**Step 3**: Go to the "**Metadata**" tab.

<figure><img src="https://631687399-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Lh39Kwxa1xxZM9WX_Bs%2Fuploads%2FC5XG29O2o9aAsXu8Ql19%2Fimage.png?alt=media&#x26;token=611a0248-e97b-4513-9288-80a66897f967" alt=""><figcaption></figcaption></figure>

**Step 4**: Scan the Metadata Animated QR code using your Polkadot Vault device.

<figure><img src="https://631687399-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Lh39Kwxa1xxZM9WX_Bs%2Fuploads%2FMyRqP06QSBJyC3Tc9Md6%2Fimage.png?alt=media&#x26;token=6d4d4185-03dc-445c-877f-55b1a01a3d79" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
Make sure your device remains stationary while the scanning process is in progress. This may take a few minutes to complete.

<p align="center"><img src="https://631687399-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Lh39Kwxa1xxZM9WX_Bs%2Fuploads%2FD9KoOKr9hEadBI6txozy%2FScreenshot_115.png?alt=media&#x26;token=fd88a99a-6a09-4cac-8e33-69c9514e902e" alt="" data-size="original"></p>
{% endhint %}

**Step 5**: Once you've completed, review the verifier certificate and select **"Approve**".

<figure><img src="https://631687399-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Lh39Kwxa1xxZM9WX_Bs%2Fuploads%2FXhkoWF84WM8wTUpwKg4L%2Fimage.png?alt=media&#x26;token=ee7ac894-240e-4cdc-9e44-ff99e90cf049" alt="" width="332"><figcaption></figcaption></figure>

Now, you have successfully updated the network's metadata!