BOB Mainnet's next upgrade is set for March 12: the Jovian Hardfork, part of OP Stack's Upgrade 17.

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What's changing

This upgrade brings a few meaningful improvements under the hood:

  • Cannon Go 1.24 support - updates the onchain fault proof VM to support Go 1.24
  • Configurable Minimum Base Fee - lets chain operators set a minimum base fee to reduce priority fee auctions (disabled by default)
  • DA Footprint Block Limit - adds an in-protocol cap on estimated DA usage to prevent spam (enabled by default, can be disabled via zero scalar onchain)

Please refer to the Upgrade 17 Notice for a full changelog. 

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When?

March 12, 2026 at 14:30:01 UTC (scheduled maintenance)

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What this means for you

For end-users and node operators: nothing changes in day-to-day experience. This is a backend infrastructure upgrade.

For external node operators: you need to make sure your infrastructure is updated before March 12. Nodes that are not configured correctly will stop syncing after activation.

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Checklist for node operators

If you run an external node, you need to: 

Update op-node to >= v1.16.5 (latest/recommended is v1.16.6) 

Update op-geth to >= v1.101605.0 (latest/recommended is v1.101609.0) 

Mainnet: 

op-node: --override.jovian=1773325801 

op-geth: --override.jovian=1773325801

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Resources

If you have questions, drop us a message, we're happy to help.

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