diff --git a/Gruntfile.js b/Gruntfile.cjs
similarity index 100%
rename from Gruntfile.js
rename to Gruntfile.cjs
diff --git a/babel.config.js b/babel.config.js
index ad977bc510ee..f46ac79b1832 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,4 +1,4 @@
-module.exports = function (api) {
+export default function (api) {
   api.cache(true);
   return {
     presets: ['@babel/preset-typescript'],
diff --git a/package.json b/package.json
index 6f6b3b0df54b..27e7a017ae9f 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "name": "@webgpu/cts",
   "version": "0.1.0",
   "description": "WebGPU Conformance Test Suite",
+  "type": "module",
   "scripts": {
     "test": "grunt all",
     "all": "grunt all",
diff --git a/src/common/runtime/helper/sys.ts b/src/common/runtime/helper/sys.ts
index d2e07ff26d30..9ac9c929bfd5 100644
--- a/src/common/runtime/helper/sys.ts
+++ b/src/common/runtime/helper/sys.ts
@@ -1,8 +1,8 @@
 /* eslint no-process-exit: "off" */
 /* eslint @typescript-eslint/no-namespace: "off" */
 
-function node() {
-  const { existsSync } = require('fs');
+async function node() {
+  const { existsSync } = await import('fs');
 
   return {
     type: 'node',
@@ -41,6 +41,6 @@ function deno() {
   };
 }
 
-const sys = typeof globalThis.process !== 'undefined' ? node() : deno();
+const sys = typeof globalThis.process !== 'undefined' ? await node() : deno();
 
 export default sys;