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Jul 19, 2026

Cardano Activates Van Rossem Hard Fork, First Fully On-Chain Governed Network Upgrade

Cardano successfully activated its Van Rossem hard fork on July 18, 2026, upgrading to Protocol Version 11 in what marks the blockchain's first upgrade approved entirely through on-chain governance without Input Output (IOHK) control. The upgrade reduces smart contract execution costs and adds Plutus enhancements.

Jul 19, 2026·7 sources
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Top claims

  • ▪The Van Rossem hard fork updates node security by preventing stake pools from reusing the same Verifiable Random Function key across the network.
  • ▪An update to the Plutus cost model, which determines the pricing schedule for on-chain smart contract operations, was enacted on May 16, 2026.
  • ▪The Van Rossem hard fork was the first upgrade in Cardano's history to be initiated, debated, and ratified entirely through the Voltaire on-chain governance framework.

Topics

Smart contractsDecentralized governanceBlockchain governanceProtocol launches & ecosystem eventsLayer 1s

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