diff --git a/src/lib/Server.js b/src/lib/Server.js
index a76e0f47..39198532 100644
--- a/src/lib/Server.js
+++ b/src/lib/Server.js
@@ -2,60 +2,64 @@
 
 const path = require('path');
 const bcrypt = require('bcryptjs');
-const crypto = require('node:crypto');
+const crypto = require('crypto');
+
+const Koa = require('koa');
+const Router = require('@koa/router');
+const session = require('koa-session');
+const bodyParser = require('koa-bodyparser');
+const serve = require('koa-static');
 
-const express = require('express');
-const expressSession = require('express-session');
 const debug = require('debug')('Server');
 
-const Util = require('./Util');
 const ServerError = require('./ServerError');
 const WireGuard = require('../services/WireGuard');
 
 const {
-  PORT,
-  WEBUI_HOST,
-  RELEASE,
-  PASSWORD,
+  PORT, WEBUI_HOST, RELEASE, PASSWORD,
 } = require('../config');
 
 module.exports = class Server {
 
   constructor() {
-    // Express
-    this.app = express()
-      .disable('etag')
-      .use('/', express.static(path.join(__dirname, '..', 'www')))
-      .use(express.json())
-      .use(expressSession({
-        secret: crypto.randomBytes(256).toString('hex'),
-        resave: true,
-        saveUninitialized: true,
-        cookie: {
-          httpOnly: true,
-        },
-      }))
-
-      .get('/api/release', (Util.promisify(async () => {
-        return RELEASE;
-      })))
+    this.app = new Koa();
+    this.router = new Router();
+
+    this.app.keys = [crypto.randomBytes(256).toString('hex')];
+
+    this.app
+      .use(async (ctx, next) => {
+        try {
+          await next();
+        } catch (err) {
+          ctx.status = err.statusCode || err.status || 500;
+          ctx.body = { error: err.message };
+          ctx.app.emit('error', err, ctx);
+        }
+      })
+      .use(serve(path.join(__dirname, '..', 'www')))
+      .use(bodyParser())
+      .use(session(this.app))
+      .use(this.router.routes())
+      .use(this.router.allowedMethods());
+
+    this.router
+      .get('/api/release', async (ctx) => {
+        ctx.body = RELEASE;
+      })
 
     // Authentication
-      .get('/api/session', Util.promisify(async (req) => {
+      .get('/api/session', async (ctx) => {
         const requiresPassword = !!process.env.PASSWORD;
-        const authenticated = requiresPassword
-          ? !!(req.session && req.session.authenticated)
-          : true;
+        const authenticated = requiresPassword ? !!(ctx.session && ctx.session.authenticated) : true;
 
-        return {
+        ctx.body = {
           requiresPassword,
           authenticated,
         };
-      }))
-      .post('/api/session', Util.promisify(async (req) => {
-        const {
-          password,
-        } = req.body;
+      })
+      .post('/api/session', async (ctx) => {
+        const { password } = ctx.request.body;
 
         if (typeof password !== 'string') {
           throw new ServerError('Missing: Password', 401);
@@ -65,53 +69,59 @@ module.exports = class Server {
           throw new ServerError('Incorrect Password', 401);
         }
 
-        req.session.authenticated = true;
-        req.session.save();
+        ctx.session.authenticated = true;
 
-        debug(`New Session: ${req.session.id}`);
-      }))
+        ctx.status = 204;
+
+        debug(`New Session: ${ctx.session.id}`);
+      })
 
     // WireGuard
-      .use((req, res, next) => {
+      .use(async (ctx, next) => {
         if (!PASSWORD) {
           return next();
         }
 
-        if (req.session && req.session.authenticated) {
+        if (ctx.session && ctx.session.authenticated) {
           return next();
         }
 
-        if (req.path.startsWith('/api/') && req.headers['authorization']) {
-          if (bcrypt.compareSync(req.headers['authorization'], bcrypt.hashSync(PASSWORD, 10))) {
+        if (ctx.path.startsWith('/api/') && ctx.headers['authorization']) {
+          if (bcrypt.compareSync(ctx.headers['authorization'], bcrypt.hashSync(PASSWORD, 10))) {
             return next();
           }
-          return res.status(401).json({
+          ctx.status = 401;
+          ctx.body = {
             error: 'Incorrect Password',
-          });
+          };
+          return;
         }
 
-        return res.status(401).json({
+        ctx.status = 401;
+        ctx.body = {
           error: 'Not Logged In',
-        });
+        };
       })
-      .delete('/api/session', Util.promisify(async (req) => {
-        const sessionId = req.session.id;
+      .delete('/api/session', async (ctx) => {
+        const sessionId = ctx.session.id;
 
-        req.session.destroy();
+        ctx.session = null;
+
+        ctx.status = 204;
 
         debug(`Deleted Session: ${sessionId}`);
-      }))
-      .get('/api/wireguard/client', Util.promisify(async (req) => {
-        return WireGuard.getClients();
-      }))
-      .get('/api/wireguard/client/:clientId/qrcode.svg', Util.promisify(async (req, res) => {
-        const { clientId } = req.params;
+      })
+      .get('/api/wireguard/client', async (ctx) => {
+        ctx.body = await WireGuard.getClients();
+      })
+      .get('/api/wireguard/client/:clientId/qrcode.svg', async (ctx) => {
+        const { clientId } = ctx.params;
         const svg = await WireGuard.getClientQRCodeSVG({ clientId });
-        res.header('Content-Type', 'image/svg+xml');
-        res.send(svg);
-      }))
-      .get('/api/wireguard/client/:clientId/configuration', Util.promisify(async (req, res) => {
-        const { clientId } = req.params;
+        ctx.set('Content-Type', 'image/svg+xml');
+        ctx.body = svg;
+      })
+      .get('/api/wireguard/client/:clientId/configuration', async (ctx) => {
+        const { clientId } = ctx.params;
         const client = await WireGuard.getClient({ clientId });
         const config = await WireGuard.getClientConfiguration({ clientId });
         const configName = client.name
@@ -119,52 +129,56 @@ module.exports = class Server {
           .replace(/(-{2,}|-$)/g, '-')
           .replace(/-$/, '')
           .substring(0, 32);
-        res.header('Content-Disposition', `attachment; filename="${configName || clientId}.conf"`);
-        res.header('Content-Type', 'text/plain');
-        res.send(config);
-      }))
-      .post('/api/wireguard/client', Util.promisify(async (req) => {
-        const { name } = req.body;
-        return WireGuard.createClient({ name });
-      }))
-      .delete('/api/wireguard/client/:clientId', Util.promisify(async (req) => {
-        const { clientId } = req.params;
-        return WireGuard.deleteClient({ clientId });
-      }))
-      .post('/api/wireguard/client/:clientId/enable', Util.promisify(async (req, res) => {
-        const { clientId } = req.params;
+        ctx.set('Content-Disposition', `attachment; filename="${configName || clientId}.conf"`);
+        ctx.set('Content-Type', 'text/plain');
+        ctx.body = config;
+      })
+      .post('/api/wireguard/client', async (ctx) => {
+        const { name } = ctx.request.body;
+        ctx.body = await WireGuard.createClient({ name });
+      })
+      .delete('/api/wireguard/client/:clientId', async (ctx) => {
+        const { clientId } = ctx.params;
+        ctx.body = await WireGuard.deleteClient({ clientId });
+      })
+      .post('/api/wireguard/client/:clientId/enable', async (ctx) => {
+        const { clientId } = ctx.params;
         if (clientId === '__proto__' || clientId === 'constructor' || clientId === 'prototype') {
-          res.end(403);
+          ctx.status = 403;
+          return;
         }
-        return WireGuard.enableClient({ clientId });
-      }))
-      .post('/api/wireguard/client/:clientId/disable', Util.promisify(async (req, res) => {
-        const { clientId } = req.params;
+        ctx.body = await WireGuard.enableClient({ clientId });
+      })
+      .post('/api/wireguard/client/:clientId/disable', async (ctx) => {
+        const { clientId } = ctx.params;
         if (clientId === '__proto__' || clientId === 'constructor' || clientId === 'prototype') {
-          res.end(403);
+          ctx.status = 403;
+          return;
         }
-        return WireGuard.disableClient({ clientId });
-      }))
-      .put('/api/wireguard/client/:clientId/name', Util.promisify(async (req, res) => {
-        const { clientId } = req.params;
+        ctx.body = await WireGuard.disableClient({ clientId });
+      })
+      .put('/api/wireguard/client/:clientId/name', async (ctx) => {
+        const { clientId } = ctx.params;
         if (clientId === '__proto__' || clientId === 'constructor' || clientId === 'prototype') {
-          res.end(403);
+          ctx.status = 403;
+          return;
         }
-        const { name } = req.body;
-        return WireGuard.updateClientName({ clientId, name });
-      }))
-      .put('/api/wireguard/client/:clientId/address', Util.promisify(async (req, res) => {
-        const { clientId } = req.params;
+        const { name } = ctx.request.body;
+        ctx.body = await WireGuard.updateClientName({ clientId, name });
+      })
+      .put('/api/wireguard/client/:clientId/address', async (ctx) => {
+        const { clientId } = ctx.params;
         if (clientId === '__proto__' || clientId === 'constructor' || clientId === 'prototype') {
-          res.end(403);
+          ctx.status = 403;
+          return;
         }
-        const { address } = req.body;
-        return WireGuard.updateClientAddress({ clientId, address });
-      }))
-
-      .listen(PORT, WEBUI_HOST, () => {
-        debug(`Listening on http://${WEBUI_HOST}:${PORT}`);
+        const { address } = ctx.request.body;
+        ctx.body = await WireGuard.updateClientAddress({ clientId, address });
       });
+
+    this.app.listen(PORT, WEBUI_HOST, () => {
+      debug(`Listening on http://${WEBUI_HOST}:${PORT}`);
+    });
   }
 
 };
diff --git a/src/lib/Util.js b/src/lib/Util.js
index cc6e89c2..a39d7769 100644
--- a/src/lib/Util.js
+++ b/src/lib/Util.js
@@ -17,41 +17,6 @@ module.exports = class Util {
     return true;
   }
 
-  static promisify(fn) {
-    // eslint-disable-next-line func-names
-    return function(req, res) {
-      Promise.resolve().then(async () => fn(req, res))
-        .then((result) => {
-          if (res.headersSent) return;
-
-          if (typeof result === 'undefined') {
-            return res
-              .status(204)
-              .end();
-          }
-
-          return res
-            .status(200)
-            .json(result);
-        })
-        .catch((error) => {
-          if (typeof error === 'string') {
-            error = new Error(error);
-          }
-
-          // eslint-disable-next-line no-console
-          console.error(error);
-
-          return res
-            .status(error.statusCode || 500)
-            .json({
-              error: error.message || error.toString(),
-              stack: error.stack,
-            });
-        });
-    };
-  }
-
   static async exec(cmd, {
     log = true,
   } = {}) {
diff --git a/src/package-lock.json b/src/package-lock.json
index a46b0bac..4dcb0e4f 100644
--- a/src/package-lock.json
+++ b/src/package-lock.json
@@ -9,10 +9,13 @@
       "version": "1.0.1",
       "license": "GPL",
       "dependencies": {
+        "@koa/router": "^12.0.1",
         "bcryptjs": "^2.4.3",
         "debug": "^4.3.4",
-        "express": "^4.18.2",
-        "express-session": "^1.17.3",
+        "koa": "^2.15.0",
+        "koa-bodyparser": "^4.4.1",
+        "koa-session": "^6.4.0",
+        "koa-static": "^5.0.0",
         "qrcode": "^1.5.3",
         "uuid": "^9.0.1"
       },
@@ -428,6 +431,26 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@koa/router": {
+      "version": "12.0.1",
+      "resolved": "https://registry.npmjs.org/@koa/router/-/router-12.0.1.tgz",
+      "integrity": "sha512-ribfPYfHb+Uw3b27Eiw6NPqjhIhTpVFzEWLwyc/1Xp+DCdwRRyIlAUODX+9bPARF6aQtUu1+/PHzdNvRzcs/+Q==",
+      "dependencies": {
+        "debug": "^4.3.4",
+        "http-errors": "^2.0.0",
+        "koa-compose": "^4.1.0",
+        "methods": "^1.1.2",
+        "path-to-regexp": "^6.2.1"
+      },
+      "engines": {
+        "node": ">= 12"
+      }
+    },
+    "node_modules/@koa/router/node_modules/path-to-regexp": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-6.2.1.tgz",
+      "integrity": "sha512-JLyh7xT1kizaEvcaXOQwOc2/Yhw6KZOvPf1S8401UyLk86CU79LN3vl7ztXGm/pZ+YjoyAJ4rxmHwbkBXJX+yw=="
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -813,11 +836,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/array-flatten": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-      "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
-    },
     "node_modules/array-includes": {
       "version": "3.1.7",
       "resolved": "https://registry.npmjs.org/array-includes/-/array-includes-3.1.7.tgz",
@@ -950,6 +968,25 @@
       "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
       "dev": true
     },
+    "node_modules/base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/bcryptjs": {
       "version": "2.4.3",
       "resolved": "https://registry.npmjs.org/bcryptjs/-/bcryptjs-2.4.3.tgz",
@@ -964,42 +1001,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/body-parser": {
-      "version": "1.20.1",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
-      "integrity": "sha512-jWi7abTbYwajOytWCQc37VulmWiRae5RyTpaCyDcS5/lMdtwSz5lOpDE67srw/HYe35f1z3fDQw+3txg7gNtWw==",
-      "dependencies": {
-        "bytes": "3.1.2",
-        "content-type": "~1.0.4",
-        "debug": "2.6.9",
-        "depd": "2.0.0",
-        "destroy": "1.2.0",
-        "http-errors": "2.0.0",
-        "iconv-lite": "0.4.24",
-        "on-finished": "2.4.1",
-        "qs": "6.11.0",
-        "raw-body": "2.5.1",
-        "type-is": "~1.6.18",
-        "unpipe": "1.0.0"
-      },
-      "engines": {
-        "node": ">= 0.8",
-        "npm": "1.2.8000 || >= 1.4.16"
-      }
-    },
-    "node_modules/body-parser/node_modules/debug": {
-      "version": "2.6.9",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
-      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
-      "dependencies": {
-        "ms": "2.0.0"
-      }
-    },
-    "node_modules/body-parser/node_modules/ms": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-      "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
-    },
     "node_modules/brace-expansion": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
@@ -1021,6 +1022,29 @@
         "node": ">=8"
       }
     },
+    "node_modules/buffer": {
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
+      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.1.13"
+      }
+    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -1029,6 +1053,18 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/cache-content-type": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/cache-content-type/-/cache-content-type-1.0.1.tgz",
+      "integrity": "sha512-IKufZ1o4Ut42YUrZSo8+qnMTrFuKkvyoLXUywKz9GJ5BrhOFGhLdkx9sG4KAnVvbY6kEcSFjLQul+DVmBm2bgA==",
+      "dependencies": {
+        "mime-types": "^2.1.18",
+        "ylru": "^1.2.0"
+      },
+      "engines": {
+        "node": ">= 6.0.0"
+      }
+    },
     "node_modules/call-bind": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.5.tgz",
@@ -1135,6 +1171,26 @@
         "wrap-ansi": "^6.2.0"
       }
     },
+    "node_modules/co": {
+      "version": "4.6.0",
+      "resolved": "https://registry.npmjs.org/co/-/co-4.6.0.tgz",
+      "integrity": "sha512-QVb0dM5HvG+uaxitm8wONl7jltx8dqhfU33DcqtOZcLSVIKSDDLDi7+0LbAKiyI8hD9u42m2YxXSkMGWThaecQ==",
+      "engines": {
+        "iojs": ">= 1.0.0",
+        "node": ">= 0.12.0"
+      }
+    },
+    "node_modules/co-body": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/co-body/-/co-body-6.1.0.tgz",
+      "integrity": "sha512-m7pOT6CdLN7FuXUcpuz/8lfQ/L77x8SchHCF4G0RBTJO20Wzmhn5Sp4/5WsKy8OSpifBSUrmg83qEqaDHdyFuQ==",
+      "dependencies": {
+        "inflation": "^2.0.0",
+        "qs": "^6.5.2",
+        "raw-body": "^2.3.3",
+        "type-is": "^1.6.16"
+      }
+    },
     "node_modules/color-convert": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
@@ -1191,18 +1247,35 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/cookie": {
-      "version": "0.5.0",
-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.5.0.tgz",
-      "integrity": "sha512-YZ3GUyn/o8gfKJlnlX7g7xq4gyO6OSuhGPKaaGssGB2qgDUS0gPgtTvoyZLTt9Ab6dC4hfc9dV5arkvc/OCmrw==",
+    "node_modules/cookies": {
+      "version": "0.9.1",
+      "resolved": "https://registry.npmjs.org/cookies/-/cookies-0.9.1.tgz",
+      "integrity": "sha512-TG2hpqe4ELx54QER/S3HQ9SRVnQnGBtKUz5bLQWtYAQ+o6GpgMs6sYUvaiJjVxb+UXwhRhAEP3m7LbsIZ77Hmw==",
+      "dependencies": {
+        "depd": "~2.0.0",
+        "keygrip": "~1.1.0"
+      },
       "engines": {
-        "node": ">= 0.6"
+        "node": ">= 0.8"
       }
     },
-    "node_modules/cookie-signature": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
-      "integrity": "sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ=="
+    "node_modules/copy-to": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/copy-to/-/copy-to-2.0.1.tgz",
+      "integrity": "sha512-3DdaFaU/Zf1AnpLiFDeNCD4TOWe3Zl2RZaTzUvWiIk5ERzcCodOE20Vqq4fzCbNoHURFHT4/us/Lfq+S2zyY4w=="
+    },
+    "node_modules/core-util-is": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
+      "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ=="
+    },
+    "node_modules/crc": {
+      "version": "3.8.0",
+      "resolved": "https://registry.npmjs.org/crc/-/crc-3.8.0.tgz",
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+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/ylru/-/ylru-1.3.2.tgz",
+      "integrity": "sha512-RXRJzMiK6U2ye0BlGGZnmpwJDPgakn6aNQ0A7gHRbD4I0uvK4TW6UqkK1V0pp9jskjJBAXd3dRrbzWkqJ+6cxA==",
+      "engines": {
+        "node": ">= 4.0.0"
+      }
     }
   }
 }
diff --git a/src/package.json b/src/package.json
index a62e7694..bd9c00cd 100644
--- a/src/package.json
+++ b/src/package.json
@@ -13,10 +13,13 @@
   "author": "Emile Nijssen",
   "license": "GPL",
   "dependencies": {
+    "@koa/router": "^12.0.1",
     "bcryptjs": "^2.4.3",
     "debug": "^4.3.4",
-    "express": "^4.18.2",
-    "express-session": "^1.17.3",
+    "koa": "^2.15.0",
+    "koa-bodyparser": "^4.4.1",
+    "koa-session": "^6.4.0",
+    "koa-static": "^5.0.0",
     "qrcode": "^1.5.3",
     "uuid": "^9.0.1"
   },