Cardano Activates Van Rossem Hard Fork, Its First Upgrade Ratified Entirely by On-Chain Community Vote

Cardano activated its Van Rossem hard fork on July 18, moving to protocol version 11 with no interruption to block production. What distinguishes this upgrade from every prior one is procedural: it is the first Cardano hard fork ratified entirely through on-chain governance, without Input Output, the development company that built the chain, directing the outcome.

The upgrade cleared three separate on-chain thresholds. Delegated representatives approved it with 76.81% support against a 60% requirement, stake pool operators approved with 53.02% against a 51% requirement, and four of five Constitutional Committee members signed off. The technical payload lowers execution costs for Plutus smart contracts, adds cryptographic tooling, and imposes a security fix requiring every stake pool to use a unique cryptographic key. The fork is named after Max van Rossem, a Dutch community governance contributor who died in 2025.

The market response was limited, with the ADA token showing little movement, a reminder that governance milestones and token prices often move separately. The narrower point concerns decentralization measurement: Cardano can now claim that changes to its own consensus rules passed without a founding company's veto, a claim that is verifiable on-chain rather than asserted in marketing.