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Nov 6, 2025
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Update upgrade details for Jovian hard fork #1852

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2 changes: 1 addition & 1 deletion notices/upgrade-17.mdx
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<Info>
The Jovian hard fork for the Sepolia Superchain will be activated at Wed 19 Nov 2025 16:00:01 UTC (`1763568001`) and the Mainnet Superchain will be optimistically activated at Tue 2 Dec 2025 16:00:01 UTC (`1764691201`) pending governance approval.

The upgrade will be executed by OP Labs on the following chains: `OP`, `Base`, `Soneium`, `Ink`, `Unichain`, `Metal`, `Mode`, `Zora`, `Arena-Z`, and `Swell` (Swell Mainnet only).
The smart contract upgrade will be prepared by OP Labs for the following chains: `OP`, `Base`, `Soneium`, `Ink`, `Unichain`, `Metal`, `Mode`, `Zora`, `Arena-Z`, and `Swell` (Swell Mainnet only). The Optimism Security Council will review and sign the upgrades.

Chains that inherit activations from the Superchain Registry and are NOT listed above must perform the upgrade themselves before the activation time. To check if you are inheriting the activation time automatically, see if your chain's [Superchain Registry toml file](https://github.com/ethereum-optimism/superchain-registry/tree/main/superchain/configs) includes the Jovian activation and the `superchain_time` field.

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| --------------- | ----------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `proxyd` | [v4.19.0](https://github.com/ethereum-optimism/infra/releases/tag/proxyd%2Fv4.19.0) or greater | You need to whitelist `eth_blobBaseFee` rpc if using proxyd for L1 load balancing. If you use `dugtrio` ensure this is also updated to the latest release. |
| `op-batcher` | [v1.16.2](https://github.com/ethereum-optimism/optimism/releases/tag/op-batcher%2Fv1.16.2) | The `op-batcher` must be restarted at least once after updating `op-node` to the latest release. The batcher loads the rollup config once at startup and this will need to happen to update the activation timestamps for Jovian. We've opened this [issue](https://github.com/ethereum-optimism/optimism/issues/18178) to improve this experience in the future. |
| `op-node` | [v1.16.1](https://github.com/ethereum-optimism/optimism/releases/tag/op-node%2Fv1.16.1) | L1 chain config must be supplied via a new flag (see the release notes). Not necessary for chains deriving from Ethereum Mainnet, Sepolia, Holesky or Hoodi. |

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| `op-geth` | [v1.101603.4](https://github.com/ethereum-optimism/op-geth/releases/tag/v1.101603.4) | |
| `op-challenger` | [v1.7.0](https://github.com/ethereum-optimism/optimism/releases/tag/op-challenger%2Fv1.7.0) | If deriving from a chain other than Ethereum Mainnet, Sepolia or Hoodi then L1 chain config must be supplied via a new flag. |

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| `kona-node` | []() | |
| `kona-host` | []() | |
| `kona-client` | []() | |
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