# London Mainnet Announcement

DevFeed: [London Mainnet Announcement](<https://devfeed.tech/articles/london-mainnet-announcement-16969.md>)

Original publisher: [Read original article](<https://blog.ethereum.org/en/2021/07/15/london-mainnet-announcement>)

Author: Tim Beiko

Published: 2021-07-15T00:00:00Z

Content type: release

Language: en

Sources: [Ethereum Foundation Blog](<https://devfeed.tech/sources/ethereum-foundation-blog.md>)

Topics: [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [releases](<https://devfeed.tech/topics/releases.md>)

Tags: [announcement](<https://devfeed.tech/tags/announcement.md>), [ethereum](<https://devfeed.tech/tags/ethereum.md>), [json](<https://devfeed.tech/tags/json.md>), [protocol-announcements](<https://devfeed.tech/tags/protocol-announcements.md>), [releases](<https://devfeed.tech/tags/releases.md>), [rpc](<https://devfeed.tech/tags/rpc.md>), [upgrade](<https://devfeed.tech/tags/upgrade.md>)

## AI overview

The article announces that Ethereum's London upgrade is ready for activation on the mainnet after a successful testnet deployment. It describes the expected activation window, required client updates, a Ropsten consensus issue, miner-related changes, and the deprecation of OpenEthereum after the upgrade.

## Source excerpt

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