Base, the Ethereum layer-two network backed by Coinbase, plans to activate its Beryl upgrade on mainnet this coming week on June 25, 2026, at 18:00 UTC. The upgrade introduces B20, a new native token standard built directly into the node software rather than deployed as a smart contract. Base engineers describe B20 as a superset of the ERC-20 standard, meaning tokens built on it stay compatible with existing wallets, exchanges, and decentralized apps.