Release notes

This release is a mandatory upgrade for all node operators of OP Stack chains

Isthmus upgrade

• The Isthmus hard fork of a limited number of OP Stack Mainnet chains is scheduled for May 9, 2025 at 16:00:01 UTC

Sepolia and Holesky gas limit increase to 60Mgas

As we are already post-Pectra on mainnet and after discussion with other Core developers we decided to increase gas limit on Sepolia and Holesky to 60MGas. This also aligns with decisions taken on ACDE 203.

Other changes

• [Optimism] Add support for all Superchain Chains by @emlautarom1 in #8105
• [Taiko] Rename taiko-mainnet configuration to taiko-alethia by @rubo in #8188
• [Holesky & Sepolia] Increase Holesky & Sepolia gaslimit by 66% to 60M by @benaadams in #8263

Full Changelog: 1.31.9...1.31.10