diff --git a/nixserver/src/components/Layout.tsx b/nixserver/src/components/Layout.tsx
index 643e471..7e9d3df 100644
--- a/nixserver/src/components/Layout.tsx
+++ b/nixserver/src/components/Layout.tsx
@@ -475,8 +475,16 @@ export default function Layout() {
     }
   }, [])
 
+  // Initial fetch
   useEffect(() => { fetchVersion() }, [fetchVersion])
 
+  // Auto-retry every 5 s while in error state (handles the service-restart window after an upgrade)
+  useEffect(() => {
+    if (!versionError) return
+    const t = setTimeout(fetchVersion, 5_000)
+    return () => clearTimeout(t)
+  }, [versionError, fetchVersion])
+
   const handleUpgrade = async () => {
     if (upgradeState === 'confirm') {
       setUpgradeState('running')
diff --git a/server/src/core/exec.ts b/server/src/core/exec.ts
index dbfa3a6..60116a6 100644
--- a/server/src/core/exec.ts
+++ b/server/src/core/exec.ts
@@ -24,7 +24,7 @@ const ALLOWED_COMMANDS = new Set([
   // Network
   'ss', 'ip', 'hostname',
   // System
-  'uname', 'free', 'ps',
+  'uname', 'uptime', 'free', 'ps', 'kill',
   // PHP
   'php8.2', 'php8.3',
   // Fail2ban