Fusaka Activation on Flow EVM Mainnet

Announcements Flow Ecosystem
1

Mainnet activation: December 3, 2025 at 18:00 UTC

Testnet activation: Live as of November 19, 2025 at 18:00 UTC

Flow EVM will activate support for Ethereum’s Fusaka hard fork to remain compatible with Ethereum tooling, infrastructure, and ecosystem behavior.

The primary change that affects Flow EVM developers is the introduction of a new maximum transaction gas limit defined in EIP-7825.

Key change: maximum transaction gas limit

Fusaka enforces a protocol-wide cap on per-transaction gas limits:

Maximum gas limit: 16,777,216 (2^24)

Any transaction submitted with a gas limit above this value will be rejected after activation.

This affects:

  • dApps that set gas limits manually
  • COA relayers or meta-transaction systems
  • Tools or scripts that pad or inflate gas estimates
  • Contract deployment transactions

Please ensure all transaction submission paths clamp gas limits to this new maximum.

References