diff --git a/index.js b/index.js
index 5560534..5a672a7 100644
--- a/index.js
+++ b/index.js
@@ -1,8 +1,8 @@
 /*! queue-microtask. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
 let promise
 
-module.exports = typeof queueMicrotask === 'function'
-  ? queueMicrotask.bind(typeof window !== 'undefined' ? window : global)
+export default typeof queueMicrotask === 'function'
+  ? queueMicrotask.bind(globalThis)
   // reuse resolved promise, and allocate it lazily
   : cb => (promise || (promise = Promise.resolve()))
     .then(cb)
diff --git a/package.json b/package.json
index d29a401..7ab559b 100644
--- a/package.json
+++ b/package.json
@@ -7,12 +7,13 @@
     "email": "feross@feross.org",
     "url": "https://feross.org"
   },
+  "type": "module",
   "bugs": {
     "url": "https://github.com/feross/queue-microtask/issues"
   },
   "devDependencies": {
     "standard": "*",
-    "tape": "^5.2.2"
+    "tape": "^5.3.1"
   },
   "funding": [
     {
diff --git a/test/basic.js b/test/basic.js
index 05d3f0e..66cf58c 100644
--- a/test/basic.js
+++ b/test/basic.js
@@ -1,5 +1,5 @@
-const test = require('tape')
-const queueMicrotask = require('../')
+import test from 'tape'
+import queueMicrotask from '../index.js'
 
 test('basic test', t => {
   t.plan(1)