diff --git a/containers/frontend/src/pages/Dashboard.js b/containers/frontend/src/pages/Dashboard.js
index 592fafa..e23a645 100644
--- a/containers/frontend/src/pages/Dashboard.js
+++ b/containers/frontend/src/pages/Dashboard.js
@@ -62,15 +62,20 @@ const Dashboard = () => {
   // Simulate real-time updates
   useEffect(() => {
     const interval = setInterval(() => {
-      // Simulate some data changes
-      setData(prev => ({
-        ...prev,
-        systemInfo: {
-          ...prev.systemInfo,
-          cpu_usage: Math.max(10, Math.min(90, prev.systemInfo.cpu_usage + (Math.random() - 0.5) * 5)),
-          memory_usage: Math.max(30, Math.min(95, prev.systemInfo.memory_usage + (Math.random() - 0.5) * 3)),
-        }
-      }));
+      // Simulate some data changes (guard against null systemInfo)
+      setData(prev => {
+        const prevSys = prev?.systemInfo || { cpu_usage: 25, memory_usage: 50 };
+        const nextCpu = Math.max(10, Math.min(90, (prevSys.cpu_usage || 25) + (Math.random() - 0.5) * 5));
+        const nextMem = Math.max(30, Math.min(95, (prevSys.memory_usage || 50) + (Math.random() - 0.5) * 3));
+        return {
+          ...prev,
+          systemInfo: {
+            ...prevSys,
+            cpu_usage: nextCpu,
+            memory_usage: nextMem,
+          }
+        };
+      });
     }, 5000);
     return () => clearInterval(interval);
   }, []);