Taiko to Activate Unzen Upgrade on August 6th

Name: Unzen Upgrade
Start: 2026-08-06T00:00:00Z
End: 2026-08-07T00:00:00Z

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Taiko will activate the Unzen upgrade on August 6th. The upgrade will require a ZK proof for every block so that no single proof system can independently finalize the chain.

Event date: August 6, 2026 UTC

What is a hardfork?

The cryptocurrency mainnet operates according to certain rules. To improve network performance or correct errors, changes are periodically introduced into it. A hard fork represents changes that are not compatible with previous versions of software supporting the cryptocurrency network. In order to continue to mine the cryptocurrency, miners need to update the software.

In some cases, as a result of a hard fork, a completely new cryptocurrency may appear, as happened with Bitcoin Cash and EthereumPoW.

Taiko.eth 🥁
@taikoxyz

Every step is on-chain and verifiable. We fixed the root cause, wiped the fraudulent state, restored the chain to where it stood before the attack, recollateralized the bridge 1:1, and reopened on July 2. OpenZeppelin reviewed the work and found no critical, high or medium issues.

Taiko.eth 🥁
@taikoxyz

We are also making Taiko stronger than it was. The Unzen upgrade, live august 6, makes a ZK proof mandatory on every block, so no single proof system can ever finalize the chain alone again.

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