# Superchain Upgrade 16 passes governance, adds interoperability support

Source: https://x.com/Optimism/status/1945596250226905527
Kiwi News: https://news.kiwistand.com/stories/Superchain-Upgrade-16-passes-governance-adds-interoperability-support?index=0x687819915ce12f7fe1b29258bd24de11349d69a1b6faa481fbedc2bedb48fcb2f812044a
Submitted by pedrovilela.eth on 2025-07-16 UTC, 5 upvotes, 0 comments

## Summary

Superchain Upgrade 16 has passed OP Governance and is scheduled to go live next week. The upgrade adds smart contract changes that support the road to interoperability, and it raises decentralization and security to meet L2Beat's updated criteria for chains to remain at Stage 1, which the article says applies to OP Mainnet, Base, Ink, and Unichain. It also increases gas limits to 500 million gas per block as part of other OP Stack improvements.

## Article

Superchain Upgrade 16 just passed OP Governance and will go live next week.

Key components of this upgrade include:

- Smart contract changes to support the road to interoperability. 

- Increased decentralization and security, meeting @L2Beat’s updated criteria for chains to remain at Stage 1, including OP Mainnet, @base, @inkonchain, and @unichain. 

- Additional improvements to the OP Stack, including increased gas limits to 500m gas per block. 

Read the full upgrade proposal here: https://gov.optimism.io/t/upgrade-16-proposal-interop-contracts-stage-1-and-go-1-23-support-in-cannon/10037