diff --git a/package-lock.json b/package-lock.json
index c4c629e..c6e06e0 100644
--- a/package-lock.json
+++ b/package-lock.json
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-      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
-      "dev": true,
-      "engines": {
-        "node": ">=0.6"
-      }
-    },
     "node_modules/ts-node": {
       "version": "10.9.1",
       "resolved": "https://registry.npmjs.org/ts-node/-/ts-node-10.9.1.tgz",
@@ -1080,19 +285,6 @@
         }
       }
     },
-    "node_modules/type-is": {
-      "version": "1.6.18",
-      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
-      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
-      "dev": true,
-      "dependencies": {
-        "media-typer": "0.3.0",
-        "mime-types": "~2.1.24"
-      },
-      "engines": {
-        "node": ">= 0.6"
-      }
-    },
     "node_modules/typescript": {
       "version": "5.2.2",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.2.2.tgz",
@@ -1120,39 +312,12 @@
       "integrity": "sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA==",
       "dev": true
     },
-    "node_modules/unpipe": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
-      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==",
-      "dev": true,
-      "engines": {
-        "node": ">= 0.8"
-      }
-    },
-    "node_modules/utils-merge": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
-      "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==",
-      "dev": true,
-      "engines": {
-        "node": ">= 0.4.0"
-      }
-    },
     "node_modules/v8-compile-cache-lib": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz",
       "integrity": "sha512-wa7YjyUGfNZngI/vtK0UHAN+lgDCxBPCylVXGp0zu59Fz5aiGtNXaq3DhIov063MorB+VfufLh3JlF2KdTK3xg==",
       "dev": true
     },
-    "node_modules/vary": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
-      "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==",
-      "dev": true,
-      "engines": {
-        "node": ">= 0.8"
-      }
-    },
     "node_modules/wabt": {
       "version": "1.0.32",
       "resolved": "https://registry.npmjs.org/wabt/-/wabt-1.0.32.tgz",
diff --git a/package.json b/package.json
index 7c8b6fa..ec6bda6 100644
--- a/package.json
+++ b/package.json
@@ -2,11 +2,9 @@
   "type": "module",
   "devDependencies": {
     "@types/diff": "^5.0.8",
-    "@types/express": "^4.17.21",
     "@types/node": "^20.9.0",
     "@types/ws": "^8.5.10",
     "bun-types": "latest",
-    "express": "^4.19.2",
     "ts-node": "^10.9.1",
     "typescript": "^5.2.2",
     "wabt": "^1.0.32"
@@ -25,6 +23,6 @@
     "test": "node --experimental-strip-types ./src/test.ts",
     "build": "npm run build-rust && npm run build-wasabi",
     "build-rust": "cd crates && cargo build --release && cd -",
-    "build-wasabi": "cd third_party/wasabi/crates/wasabi_js && npm run build && wasm-pack build --target web && cd ../../.." 
+    "build-wasabi": "cd third_party/wasabi/crates/wasabi_js && npm run build && wasm-pack build --target web && cd ../../.."
   }
 }
diff --git a/src/test-slice-dice.ts b/src/test-slice-dice.ts
index 133368b..45aa9ea 100644
--- a/src/test-slice-dice.ts
+++ b/src/test-slice-dice.ts
@@ -1,4 +1,3 @@
-import express from "express";
 //@ts-ignore
 import { expect } from "playwright/test";
 import { exit } from "process";
@@ -6,6 +5,7 @@ import { Server } from "http";
 import path from "path";
 import { execSync } from "child_process";
 import Benchmark, { Analyser } from "./web.ts";
+import { startServer } from "./test.ts";
 
 export default async function runSliceDiceTests(names: string[], options) {
   for (let name of names) {
@@ -50,23 +50,6 @@ async function runWasmR3(options: any, subsetPath: string, benchmarkPath: string
   console.log(`${endTime - startTime}ms`);
 }
 
-async function startServer(websitePath: string): Promise<string> {
-  const app = express();
-  const port = 0;
-  app.use(express.static(websitePath));
-  const server: Server = await new Promise((resolve) => {
-    const server = app.listen(port, () => {
-      resolve(server);
-    });
-  })
-  const address = server.address();
-  if (address === null || typeof address === 'string') {
-    throw new Error('Server address is not available');
-  }
-  const url = 'http://localhost:' + address.port
-  return url
-};
-
 function checkResult(benchmarkPath: string, fidx: any) {
   // TODO: is it always the case that bin_1 is the subset?
   execSync(`wasmtime ${path.join(benchmarkPath, 'out', `${fidx}`, 'benchmarks', 'bin_1', 'replay.wasm')}`);
diff --git a/src/test.ts b/src/test.ts
index a07edf3..7a8cb08 100644
--- a/src/test.ts
+++ b/src/test.ts
@@ -1,7 +1,6 @@
-import fs from "fs/promises";
-import path from "path";
-import express from "express";
-import { Server } from "http";
+import fs, { readFile, stat } from "fs/promises";
+import path, { extname, join } from "path";
+import { createServer, Server } from "http";
 import commandLineArgs from "command-line-args";
 import { execSync } from "child_process";
 import { filter } from "./filter.ts";
@@ -137,23 +136,58 @@ function getFrontendPath(options) {
     return "chromium";
   }
 }
-
-async function startServer(websitePath: string): Promise<[Server, string]> {
-  const app = express();
+export async function startServer(websitePath: string): Promise<[Server, string]> {
   const port = 0;
-  app.use(express.static(websitePath));
-  const server: Server = await new Promise((resolve) => {
-    const server = app.listen(port, () => {
-      resolve(server);
+
+  const server = createServer(async (req, res) => {
+    try {
+      const filePath = join(websitePath, req.url === '/' ? 'index.html' : req.url!);
+      const stats = await stat(filePath);
+
+      if (stats.isDirectory()) {
+        res.writeHead(404, { 'Content-Type': 'text/plain' });
+        res.end('404 Not Found');
+        return;
+      }
+
+      const content = await readFile(filePath);
+      const contentType = getContentType(filePath);
+
+      res.writeHead(200, { 'Content-Type': contentType });
+      res.end(content);
+    } catch (error) {
+      res.writeHead(404, { 'Content-Type': 'text/plain' });
+      res.end('404 Not Found');
+    }
+  });
+
+  await new Promise<void>((resolve) => {
+    server.listen(port, () => {
+      resolve();
     });
-  })
+  });
+
   const address = server.address();
   if (address === null || typeof address === 'string') {
     throw new Error('Server address is not available');
   }
+
   const url = `http://localhost:${address.port}`;
+  return [server, url];
+}
 
-  return [server, url]
+function getContentType(filePath: string): string {
+  const ext = extname(filePath).toLowerCase();
+  const contentTypes: Record<string, string> = {
+    '.html': 'text/html',
+    '.css': 'text/css',
+    '.js': 'text/javascript',
+    '.json': 'application/json',
+    '.png': 'image/png',
+    '.jpg': 'image/jpeg',
+    '.gif': 'image/gif',
+  };
+  return contentTypes[ext] || 'application/octet-stream';
 }
 
 export async function getDirectoryNames(folderPath: string) {