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Ethereum
Ethereum Glamsterdam upgrade: action required for workflows with a gas limit
Ethereum is upgrading to Glamsterdam during Q4 2026, which changes the gas model of the chain. No action is required unless your workflow sets a gas limit.
Timelines:
- Ethereum Sepolia — 6 October 2026 at 13:53:36 UTC
- Ethereum Hoodi — Q4 2026 (to be confirmed)
- Ethereum Mainnet — Q4 2026 (to be confirmed)
Onchain writes to each network may fail for roughly 30 minutes before and after its upgrade. If your workflow sets a gas limit, start testing against Ethereum Sepolia from 6 October 2026 (add gas headroom or unset the gas limit), then update your workflows for Ethereum Mainnet once it is upgraded.
See Network Upgrades for details.