diff --git a/index.js b/index.js
index 7d01869..962580f 100644
--- a/index.js
+++ b/index.js
@@ -1,33 +1,32 @@
 // Imports
-var Docker = require('dockerode');
-var socketIO = require('socket.io');
-var pty = require("node-pty");
-var fsw = require('fs').promises;
-var fs = require('fs');
-var os = require('os');
-var yaml = require('js-yaml');
-var _ = require('lodash');
-var si = require('systeminformation');
-var express = require('express');
-var app = require('express')();
-var privateKey  = fs.readFileSync('/opt/kasm/certs/kasm_wizard.key', 'utf8');
-var certificate = fs.readFileSync('/opt/kasm/certs/kasm_wizard.crt', 'utf8');
-var credentials = {key: privateKey, cert: certificate};
-var https = require('https').Server(credentials, app);
-var baserouter = express.Router();
-var docker = new Docker({socketPath: '/var/run/docker.sock'});
-var arch = os.arch().replace('x64', 'amd64');
-var baseUrl = process.env.SUBFOLDER || '/';
-var version = process.env.VERSION || 'stable';
-var port = process.env.KASM_PORT || '443';
+const Docker = require('dockerode');
+const socketIO = require('socket.io');
+const pty = require("node-pty");
+const fsw = require('fs').promises;
+const fs = require('fs');
+const os = require('os');
+const yaml = require('js-yaml');
+const _ = require('lodash');
+const si = require('systeminformation');
+const express = require('express');
+const app = require('express')();
+const privateKey  = fs.readFileSync('/opt/kasm/certs/kasm_wizard.key', 'utf8');
+const certificate = fs.readFileSync('/opt/kasm/certs/kasm_wizard.crt', 'utf8');
+const credentials = {key: privateKey, cert: certificate};
+const https = require('https').Server(credentials, app);
+const baserouter = express.Router();
+const docker = new Docker({socketPath: '/var/run/docker.sock'});
+const arch = os.arch().replace('x64', 'amd64');
+const baseUrl = process.env.SUBFOLDER || '/';
+const port = process.env.KASM_PORT || '443';
 const { spawn } = require('node:child_process');
-var EULA;
-var images;
-var currentVersion;
-var sourceLocal = false;
-var gpuInfo;
-var installSettings = {};
-var upgradeSettings = {};
+let EULA;
+let images;
+let currentVersion;
+let sourceLocal = false;
+let gpuInfo;
+let installSettings = {};
+let upgradeSettings = {};
 
 // Find the best matching compatibility entry for the current version.
 // Exact version match takes precedence over wildcard (e.g. "1.18.x").
@@ -186,17 +185,17 @@ async function setGpu(imagesI) {
   let card = gpu.slice(-1);
   let render = (Number(card) + 128).toString();
   // Handle NVIDIA Gpus
-  var baseRun;
+  let baseRun;
   if (gpuName.indexOf('NVIDIA') !== -1) {
     baseRun = JSON.parse('{"runtime":"nvidia","environment":{"NVIDIA_DRIVER_CAPABILITIES":"all","KASM_EGL_CARD":"/dev/dri/card' + card + '","KASM_RENDERD":"/dev/dri/renderD' + render + '"},"device_requests":[{"driver": "","count": -1,"device_ids": null,"capabilities":[["gpu"]],"options":{}}]}');
   } else {
     baseRun = JSON.parse('{"environment":{"DRINODE":"/dev/dri/renderD' + render + '", "HW3D": true},"devices":["/dev/dri/card' + card + ':/dev/dri/card' + card + ':rwm","/dev/dri/renderD' + render + ':/dev/dri/renderD' + render + ':rwm"]}');
   }
   let baseExec = JSON.parse('{"first_launch":{"user":"root","cmd": "bash -c \'chown -R kasm-user:kasm-user /dev/dri/*\'"}}');
-  for (var i=0; i<imagesI.images.length; i++) {
+  for (let i=0; i<imagesI.images.length; i++) {
     console.log(imagesI.images[i]['run_config']);
-    finalRun = _.merge(imagesI.images[i]['run_config'], baseRun)
-    finalExec = _.merge(imagesI.images[i]['exec_config'], baseExec)
+    let finalRun = _.merge(imagesI.images[i]['run_config'], baseRun)
+    let finalExec = _.merge(imagesI.images[i]['exec_config'], baseExec)
     imagesI.images[i]['run_config'] = finalRun;
     imagesI.images[i]['exec_config'] = finalExec;
   }
@@ -238,14 +237,14 @@ app.use(baseUrl, baserouter);
 https.listen(3000);
 
 //// socketIO comms ////
-io = socketIO(https, {path: baseUrl + 'socket.io'});
+const io = socketIO(https, {path: baseUrl + 'socket.io'});
 io.on('connection', async function (socket) {
   // Run bash install with our custom flags
   async function install(data) {
     // Determine install settings
     installSettings = data[0];
-    var imagesI = data[1];
-    installFlags = ['/kasm_release/install.sh', '-W', '-B' ,'-H', '-e', '-L', port, '-P', installSettings.adminPass, '-U', installSettings.userPass];
+    let imagesI = data[1];
+    let installFlags = ['/kasm_release/install.sh', '-W', '-B' ,'-H', '-e', '-L', port, '-P', installSettings.adminPass, '-U', installSettings.userPass];
     if (imagesI && typeof imagesI === 'object' && Array.isArray(imagesI.images) && imagesI.images.length < 10) {
       installFlags.push('-b');
     }
@@ -281,7 +280,7 @@ io.on('connection', async function (socket) {
 
   // Run bash upgrade with our custom flags
   async function upgrade(data) {
-    upgradeFlags = ['/kasm_release/upgrade.sh', '-L', port];
+    let upgradeFlags = ['/kasm_release/upgrade.sh', '-L', port];
 
     // Patch service image tags for rolling builds
     await appendRollingToServiceImages();
diff --git a/package.json b/package.json
index 1b39770..3f64eb3 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
-    "dockerode": "^3.3.2",
+    "dockerode": "^4.0.10",
     "express": "^4.18.1",
     "js-yaml": "^4.1.0",
     "lodash": "^4.17.21",
diff --git a/public/js/index.js b/public/js/index.js
index e135856..77992ce 100644
--- a/public/js/index.js
+++ b/public/js/index.js
@@ -1,21 +1,21 @@
 // Variables
-var EULA;
-var images;
-var gpus;
-var term;
-var installImages = [];
-var installSettings = {};
-var upgradeSettings = {};
-var currentVersion = '';
-var isUpgrade = false;
-var selected = false;
+let EULA;
+let images;
+let gpus;
+let term;
+let installImages = [];
+const installSettings = {};
+const upgradeSettings = {};
+let currentVersion = '';
+let isUpgrade = false;
+let selected = false;
 
 // Socket.io connection
-var host = window.location.hostname; 
-var port = window.location.port;
-var protocol = window.location.protocol;
-var path = window.location.pathname;
-var socket = io(protocol + '//' + host + ':' + port, { path: path + 'socket.io'});
+const host = window.location.hostname;
+const port = window.location.port;
+const protocol = window.location.protocol;
+const path = window.location.pathname;
+const socket = io(protocol + '//' + host + ':' + port, { path: path + 'socket.io'});
 
 //// Page Functions ////
 
@@ -33,7 +33,7 @@ async function install() {
   if (installImages.length == 0) {
     socket.emit('install', [installSettings, false]);
   } else {
-    for await (let image of installImages) {
+    for (let image of installImages) {
       let srcImage = images.images.find(x => x.friendly_name === image);
       if (!srcImage) {
         alert('Error: image "' + image + '" not found. Please refresh and try again.');
@@ -71,7 +71,7 @@ function showTerminal() {
   $('#terminal').empty();
   $('#terminal').css('display', 'block');
   term = new Terminal();
-  fitaddon = new FitAddon.FitAddon();
+  let fitaddon = new FitAddon.FitAddon();
   term.loadAddon(fitaddon);
   term.open($('#terminal')[0]);
   fitaddon.fit();
@@ -112,14 +112,14 @@ async function renderDash(data) {
   // Store GPU info
   $('body').data('gpuInfo', info.gpuInfo);
   // Upgrade button if needed
-  var upgrade;
+  let upgrade;
   if (info.currentVersion !== info.localVersion) {
     upgrade = $('<button>', {class: 'btn btn-primary', onclick: 'renderUpgrade()'}).text('Upgrade to ' + info.currentVersion)
   } else {
     upgrade = info.currentVersion;
   }
   // Kasm docker containers
-  containersTable = $('<tbody>');
+  let containersTable = $('<tbody>');
   containersTable.append(
     $('<tr>').append([
       $('<th>').text('Web URL'),
@@ -134,7 +134,7 @@ async function renderDash(data) {
       $('<td>').append(upgrade)
     ])
   );
-  for await (let container of info.containers) {
+  for (let container of info.containers) {
     containersTable.append(
       $('<tr>').append([
         $('<th>').text(container.Names[0]),
@@ -142,7 +142,7 @@ async function renderDash(data) {
       ])
     );
   }
-  dockerCard = $('<div>', {id: 'dockerinfo', class: 'terminal-card'}).append([
+  let dockerCard = $('<div>', {id: 'dockerinfo', class: 'terminal-card'}).append([
     $('<header>').text('Kasm Docker containers'),
     $('<table>').append(containersTable)
   ]);
@@ -150,7 +150,7 @@ async function renderDash(data) {
   let usedmem = (info.mem.active/info.mem.total)*100;
   let totalmem = parseFloat(info.mem.total/1000000000).toFixed(2);
   let diskbuffer = parseFloat(info.mem.buffcache/1000000000).toFixed(2);
-  sysinfoTable = $('<tbody>').append([
+  let sysinfoTable = $('<tbody>').append([
     $('<tr>').append([
       $('<th>').text('CPU'),
       $('<td>').text(info.cpu.vendor + ' ' + info.cpu.brand)
@@ -190,7 +190,7 @@ async function renderDash(data) {
       )
     ])
   ]);
-  systemCard = $('<div>', {id: 'systeminfo', class: 'terminal-card'}).append([
+  let systemCard = $('<div>', {id: 'systeminfo', class: 'terminal-card'}).append([
     $('<header>').text('System Information'),
     $('<table>').append(sysinfoTable)
   ]);
@@ -231,7 +231,7 @@ async function pickSettings() {
     $('<input>', {name: 'userPass', id: 'userPass', type: 'password', required: true, placeholder: 'required'})
   ]);
   let gpuOptions = [$('<option>', {value: 'disabled'}).text('Disabled')];
-  for await (let card of Object.keys(gpus || {})) {
+  for (let card of Object.keys(gpus || {})) {
     gpuOptions.push($('<option>', {value: card + '|' + gpus[card]}).text(card + ' - ' + gpus[card]));
   }
   let forceGpu = $('<div>', {class: 'form-group'}).append([
@@ -298,8 +298,8 @@ function renderUpgrade() {
 
 // Render image selection
 async function pickImages(upgrade) {
-  var installText;
-  var installFunction;
+  let installText;
+  let installFunction;
   if (upgrade) {
     installText = 'Upgrade';
     installFunction = 'upgrade()';
@@ -311,7 +311,7 @@ async function pickImages(upgrade) {
   titleChange('Image Selection');
   let imagesDiv = $('<div>', {class: 'cardcontainer', id: 'images'});
   $('#container').append(imagesDiv);
-  for await (let image of images.images) {
+  for (let image of images.images) {
     let imageName = $('<p>').text(image.friendly_name);
     let imageDiv = $('<div>', {
       class: 'card',
@@ -382,8 +382,8 @@ function selectAll() {
 
 // Show finished page
 function done(data) {
-  var port = (typeof data === 'object') ? data.port : data;
-  var rollingTag = (typeof data === 'object') ? data.rollingTag : null;
+  const port = (typeof data === 'object') ? data.port : data;
+  const rollingTag = (typeof data === 'object') ? data.rollingTag : null;
   showContainer();
   titleChange('Complete');
   let titleBar = $('<div>');