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This page outlines changes related to the Jovian Upgrade for node operators.
This page will be kept updated with key information about the upgrade. Activation dates are TBD.
  • Celo Sepolia testnet activation: TBD (Q1 2026)
  • Mainnet activation: TBD (Q1 2026)

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What is the Jovian Hardfork?

The Jovian Hardfork adopts features from Optimism’s Jovian hardfork along with Celo-specific improvements focused on gas accounting and base fee alignment. Key changes include:
  • Transfer Precompile Address Warming: The transfer precompile now warms from and to addresses during execution, aligning with standard EVM behavior and ensuring correct gas accounting for subsequent operations on the same address.
  • Minimum Base Fee Transition: Celo moves from its own gas price floor mechanism to Optimism’s configurable Minimum Base Fee standard, maintaining a cost floor while aligning with OP Stack conventions. For the full technical specification, see the Jovian upgrade spec.
  • L1 Fusaka Upgrade: Celo now includes improvements to handle the L1 Fusaka upgrade, leading to better compatibility with the Optimism stack. For more details see OP Fusaka upgrade notice.

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For Node Operators

Software versions will be announced ahead of the activation date. Check back for updates.
Docker ComposeThe required configuration for each service can be found in our Docker Compose Setup, where every network has a corresponding <network>.env file.