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Cardano Triggers Hard Fork With First Community-Voted Upgrade

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Cardano has hard forked, implementing the Van Rossem upgrade over the weekend and transitioning the network to protocol version 11.

Key facts

Summary

Cardano activated the Van Rossem hard fork on July 18, reaching protocol version 11 with zero downtime. It's the network's first major upgrade ratified entirely through on-chain community governance, without any centralized company directing the process. The fork lowers Plutus smart contract execution costs and bundles five technical improvements, including new cryptographic tools and a security fix requiring every stake pool to use a unique cryptographic key. It’s not the first time Cardano has executed a hard fork—but it is the first time it’s done so without the intervention of the blockchain’s founding development company, Input Output.