> ## Documentation Index
> Fetch the complete documentation index at: https://developers.fireblocks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# When a Newer API Co-signer Version Is Available

> The Co-signers tab flags a newer API Co-signer version and gives you the script and upgrade instructions. You run the upgrade on your own infrastructure.

The Co-signers tab in the Fireblocks Console flags an API Co-signer when a newer version is available. Select **Upgrade** to open a dialog with the current version, the latest version, the installation script, and the upgrade instructions. You run the upgrade on the machine or cloud environment where the Co-signer is installed.

## How you know a newer version is available

In the Co-signers tab, the version of an outdated Co-signer appears in red with an error icon. An **Upgrade** link appears next to it. Hover over the icon to see "A newer version is available. Upgrading is highly recommended."

You can also select the three-dot menu of the Co-signer and then select **Upgrade**.

Fireblocks recommends using the latest version. Upgrading gives you the newest features and improvements.

## Before you start

The indicator appears only for a Co-signer that reports its type and version. Older Co-signer builds do not report them, so they do not show the indicator.

Confirm that you can access the machine or the cloud environment where the Co-signer runs.

## Upgrade a Co-signer

1. In the Fireblocks Console, go to **Developer center** > **Co-signers**.
2. Find the Co-signer with the red version.
3. Select **Upgrade**. A dialog opens that shows the current version and the latest version.
4. Select **release notes** to review the changes.
5. Select **installation script** to copy the installation script link.
6. Select **upgrade instructions** and follow the steps for your Co-signer type:
   * [SGX](https://developers.fireblocks.com/cosigners/sgx/api-cosigner-maintenance-sgx#update-the-co-signer). Azure, IBM Cloud, Alibaba Cloud, and on-premises use these steps.
   * [AWS Nitro](https://developers.fireblocks.com/cosigners/aws/api-cosigner-maintenance-aws-nitro.md#update-the-co-signer)
   * [Google Cloud Confidential Space](https://developers.fireblocks.com/cosigners/google-cloud/api-cosigner-maintenance-gcp-confspace.md#update-the-co-signer)
7. Monitor the Co-signer logs to confirm that the Co-signer starts with the new version.
8. In the dialog, select **Got it**.

The upgrade uses your existing configuration and keeps all paired API users.

## Things to know

You can also download the installation package from **Settings** > **General** > **API co-signer**.

After the upgrade, the Co-signer shows its new version in the Co-signers tab, and the red indicator disappears.

Version history:

* [SGX API Co-signer version history](https://developers.fireblocks.com/cosigners/sgx/api-cosigner-versions-sgx)
* [AWS Nitro API Co-signer version history](https://developers.fireblocks.com/cosigners/aws/api-cosigner-versions-aws.md)
* [Google Cloud Confidential Space API Co-signer version history](https://developers.fireblocks.com/cosigners/google-cloud/api-cosigner-versions-gcp.md)

For the rest of the Co-signers tab, see [The Co-signer management tab](https://support.fireblocks.io/hc/en-us/articles/17923671680540-The-Co-signer-management-tab).