diff --git a/packages/bruno-electron/src/index.js b/packages/bruno-electron/src/index.js
index cad10a10c..6b353112f 100644
--- a/packages/bruno-electron/src/index.js
+++ b/packages/bruno-electron/src/index.js
@@ -1,5 +1,15 @@
+const fs = require('fs');
 const path = require('path');
 const isDev = require('electron-is-dev');
+
+if (isDev) {
+  if (!fs.existsSync('./src/sandbox/bundle-browser-rollup.js')) {
+    console.log('JS Sandbox libraries have not been bundled yet');
+    console.log('Please run the below command \nnpm run sandbox:bundle-libraries --workspace=packages/bruno-js');
+    throw new Error('JS Sandbox libraries have not been bundled yet');
+  }
+}
+
 const { format } = require('url');
 const { BrowserWindow, app, Menu, ipcMain } = require('electron');
 const { setContentSecurityPolicy } = require('electron-util');
@@ -70,7 +80,7 @@ app.on('ready', async () => {
 
   mainWindow.once('ready-to-show', () => {
     mainWindow.show();
-  })
+  });
   const url = isDev
     ? 'http://localhost:3000'
     : format({