diff --git a/react/package.json b/react/package.json
index d3001c7..21f609e 100644
--- a/react/package.json
+++ b/react/package.json
@@ -17,7 +17,7 @@
     "@types/react-dom": "^17.0.8",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
-    "react-scripts": "4.0.3",
+    "react-scripts": "5.0.0",
     "react-virtualized-auto-sizer": "^1.0.6",
     "react-window": "^1.8.6",
     "typescript": "^4.3.4",
diff --git a/react/public/var/config.json b/react/public/var/config.json
index 0e07f34..2d62624 100644
--- a/react/public/var/config.json
+++ b/react/public/var/config.json
@@ -1,5 +1,5 @@
 {
-   "socket_server_port": 8080,
+   "socket_server_port": 80,
    "socket_server_address": "*",
    "debug": true,
     "max_upload_size": 1048576,
diff --git a/react/src/ToobSpectrumResponseView.tsx b/react/src/ToobSpectrumResponseView.tsx
index 55da8ff..8d6a973 100644
--- a/react/src/ToobSpectrumResponseView.tsx
+++ b/react/src/ToobSpectrumResponseView.tsx
@@ -28,7 +28,7 @@ import withStyles from '@mui/styles/withStyles';
 import { PiPedalModelFactory, PiPedalModel, State,ListenHandle } from "./PiPedalModel";
 import { StandardItemSize } from './PluginControlView';
 import Utility from './Utility';
-import { setInterval,clearInterval } from 'timers';
+// import { setInterval,clearInterval } from 'timers'; // no longer requires polyfill (webpack >= 5)
 
 
 const SPECTRUM_RESPONSE_VECTOR_URI = "http://two-play.com/plugins/toob#spectrumResponse";