Polymarket will undergo maintenance for one hour on April 28, 2026, at 11:00 AM UTC (around 7 PM Beijing time). Key points: Enhanced Security: Improved security. Introducing pUSD: Launching pUSD (Polymarket USD) — Polymarket's new collateralized token, fully backed 1:1 by USDC, replacing the previous USDC.e. From now on, platform trading and settlements will use pUSD. 1:1 Balance Conversion: Balances will be automatically converted 1:1. Improved Infrastructure: Upgraded infrastructure (rewritten trading engine CLOB V2, new smart contracts, etc.) aimed at reducing gas fees, minimizing transaction failures, and improving overall speed and stability. ❗️Note: All unfilled limit orders will be automatically canceled. After the upgrade, you'll need to manually place your orders again.