Base Sepolia Testnet Fusaka Readiness

Scheduled Maintenance Report for Base

Completed

The scheduled maintenance has been completed.

Posted Oct 14, 2025 - 08:00 UTC

In progress

Scheduled maintenance is currently in progress. We will provide updates as necessary.

Posted Oct 14, 2025 - 07:30 UTC

Update

Reminder that Ethereum Sepolia (L1) will activate the Fusaka upgrade tomorrow, October 14th 2025 at 07:36:00 UTC. This requires updates to your Base L2 node clients for Base's Sepolia testnet.

Please ensure you are running the latest base/node release here: https://github.com/base/node/releases/tag/v0.13.1

It is also required that the L1 nodes passed via `--l1.beacon` flag to op-node are configured to store all blob data columns.

Posted Oct 13, 2025 - 20:55 UTC

Update

Correction, the release is available here: https://github.com/base/node/releases/tag/v0.13.0

Posted Oct 09, 2025 - 00:59 UTC

Update

The official base/node release required for Base Sepolia testnet nodes is available here: https://github.com/base/node/releases/tag/v0.13.0

This must be deployed by October 14th at 07:36:00 UTC.

Posted Oct 09, 2025 - 00:56 UTC

Scheduled

On October 14th 2025 (UTC `2025-10-14 07:36:00`), Ethereum Sepolia L1 will activate the Fusaka upgrade.

The Base node software required for Fusaka support will be released on October 8th. Operators of Base Sepolia nodes must upgrade to the new version before October 14th.

Posted Oct 07, 2025 - 13:17 UTC

This scheduled maintenance affected: Testnet (Client Software).