Well... i don't know if this is going to work, but this is what I'm going to try: // Add useEffect to your existing imports import { Suspense, useState, useEffect } from 'react'; // Add this effect right after your existing useEffect hooks export function App(): JSX.Element | null { const medplum = useMedplum(); // Add token refresh effect useEffect(() => { if (!medplum) return; // Refresh token every 45 minutes (giving 15 min buffer before 1 hour expiration) const refreshInterval = setInterval(() => { medplum.refreshIfExpired(900); // 900 seconds (15 minutes) grace period }, 45 * 60 * 1000); return () => clearInterval(refreshInterval); }, [medplum]); // ... rest of your existing App component code }