The opBNB network has successfully activated the Fourier Mainnet hardfork starting January 7, 2026 at 03:00 UTC. This upgrade brings a critical performance improvement: the block interval has been halved from 500ms to 250ms through PR #305, effectively doubling the network's transaction throughput capability. Node operators running the network are required to update their systems immediately—make sure you're on one of the officially supported client versions to avoid missing blocks or network disconnections. This is a mandatory upgrade, so timely action is essential for maintaining network participation.