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

# Jovian

> Hardfork registry entry for the Jovian network upgrade, which introduced the minimum base fee and DA footprint limit.

<Info>
  **Normative spec:** the [Jovian specification](https://specs.optimism.io/protocol/jovian/overview.html)
  is the canonical definition of this upgrade. This page records activation data
  and operational pointers; it does not restate the spec.
</Info>

Jovian introduced fee-market and data-availability controls for chain
operators.

|                                         |                                                                                                                             |
| --------------------------------------- | --------------------------------------------------------------------------------------------------------------------------- |
| Status                                  | Active                                                                                                                      |
| Governing spec                          | [specs.optimism.io](https://specs.optimism.io/protocol/jovian/overview.html)                                                |
| Governance approval                     | [proposal](https://vote.optimism.io/proposals/3118571676657709551286937570456546163542507117143005939043790253732885172699) |
| Operator notice                         | [Upgrade 17 notice](/notices/archive/upgrade-17)                                                                            |
| Mainnet activation (superchain default) | Tue, 02 Dec 2025 16:00:01 UTC (`1764691201`)                                                                                |
| Sepolia activation (superchain default) | Wed, 19 Nov 2025 16:00:01 UTC (`1763568001`)                                                                                |

Minimum component versions (from [Upgrade 17 notice](/notices/archive/upgrade-17)):

| Component       | Minimum version |
| --------------- | --------------- |
| `op-node`       | `v1.16.2`       |
| `op-batcher`    | `v1.16.2`       |
| `op-geth`       | `v1.101603.5`   |
| `op-challenger` | `v1.7.0`        |
| `kona-node`     | `v1.2.4`        |
| `op-reth`       | `v1.9.2`        |

## What changed

Per the [spec overview](https://specs.optimism.io/protocol/jovian/overview.html):

* Execution layer:
  [minimum base fee](https://specs.optimism.io/protocol/jovian/exec-engine.html#minimum-base-fee),
  [DA footprint limit](https://specs.optimism.io/protocol/jovian/exec-engine.html#da-footprint-block-limit),
  and [operator fee](https://specs.optimism.io/protocol/jovian/exec-engine.html#operator-fee)
  changes.
* Consensus layer: network upgrade transactions applied during derivation;
  auto-upgrade and extension of the `L1Block` (L1 attributes) predeploy.
* Smart contracts: `SystemConfig` updates.

The [Upgrade 17 notice](/notices/archive/upgrade-17) covers the operator steps
that accompanied activation.