diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index cfb392e..5905863 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [16]
+        node: [14, 16, 18]
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
diff --git a/package.json b/package.json
index 69906b5..dcce3be 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,9 @@
   "name": "@pkgjs/parseargs",
   "version": "0.9.0",
   "description": "Polyfill of future proposal for `util.parseArgs()`",
+  "engines": {
+    "node": ">=14"
+  },
   "main": "index.js",
   "exports": {
     ".": "./index.js",
diff --git a/primordials.js b/primordials.js
index e2af4e8..63e23ab 100644
--- a/primordials.js
+++ b/primordials.js
@@ -1,3 +1,28 @@
+/*
+This file is copied from https://github.com/nodejs/node/blob/v14.19.3/lib/internal/per_context/primordials.js
+under the following license:
+
+Copyright Node.js contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+*/
+
 'use strict';
 
 /* eslint-disable node-core/prefer-primordials */
@@ -169,7 +194,6 @@ function copyPrototype(src, dest, prefix) {
 
 // Create copies of intrinsic objects
 [
-  'AggregateError',
   'Array',
   'ArrayBuffer',
   'BigInt',
@@ -180,7 +204,6 @@ function copyPrototype(src, dest, prefix) {
   'Date',
   'Error',
   'EvalError',
-  'FinalizationRegistry',
   'Float32Array',
   'Float64Array',
   'Function',
@@ -204,7 +227,6 @@ function copyPrototype(src, dest, prefix) {
   'Uint8Array',
   'Uint8ClampedArray',
   'WeakMap',
-  'WeakRef',
   'WeakSet',
 ].forEach((name) => {
   // eslint-disable-next-line no-restricted-globals
@@ -232,16 +254,12 @@ function copyPrototype(src, dest, prefix) {
 // Refs: https://tc39.es/ecma262/#sec-%typedarray%-intrinsic-object
 [
   { name: 'TypedArray', original: Reflect.getPrototypeOf(Uint8Array) },
-  {
-    name: 'ArrayIterator', original: {
-      prototype: Reflect.getPrototypeOf(Array.prototype[Symbol.iterator]()),
-    }
-  },
-  {
-    name: 'StringIterator', original: {
-      prototype: Reflect.getPrototypeOf(String.prototype[Symbol.iterator]()),
-    }
-  },
+  { name: 'ArrayIterator', original: {
+    prototype: Reflect.getPrototypeOf(Array.prototype[Symbol.iterator]()),
+  } },
+  { name: 'StringIterator', original: {
+    prototype: Reflect.getPrototypeOf(String.prototype[Symbol.iterator]()),
+  } },
 ].forEach(({ name, original }) => {
   primordials[name] = original;
   // The static %TypedArray% methods require a valid `this`, but can't be bound,
@@ -254,17 +272,13 @@ function copyPrototype(src, dest, prefix) {
 
 const {
   ArrayPrototypeForEach,
-  FinalizationRegistry,
   FunctionPrototypeCall,
   Map,
   ObjectFreeze,
   ObjectSetPrototypeOf,
-  Promise,
-  PromisePrototypeThen,
   Set,
   SymbolIterator,
   WeakMap,
-  WeakRef,
   WeakSet,
 } = primordials;
 
@@ -309,9 +323,6 @@ const copyProps = (src, dest) => {
   });
 };
 
-/**
- * @type {typeof primordials.makeSafe}
- */
 const makeSafe = (unsafe, safe) => {
   if (SymbolIterator in unsafe.prototype) {
     const dummy = new unsafe();
@@ -326,7 +337,7 @@ const makeSafe = (unsafe, safe) => {
           SymbolIterator in (FunctionPrototypeCall(desc.value, dummy) ?? {})
         ) {
           const createIterator = uncurryThis(desc.value);
-          next ??= uncurryThis(createIterator(dummy).next);
+          next = next ?? uncurryThis(createIterator(dummy).next);
           const SafeIterator = createSafeIterator(createIterator, next);
           desc.value = function() {
             return new SafeIterator(this);
@@ -363,7 +374,6 @@ primordials.SafeWeakMap = makeSafe(
     constructor(i) { super(i); } // eslint-disable-line no-useless-constructor
   }
 );
-
 primordials.SafeSet = makeSafe(
   Set,
   class SafeSet extends Set {
@@ -377,55 +387,6 @@ primordials.SafeWeakSet = makeSafe(
   }
 );
 
-primordials.SafeFinalizationRegistry = makeSafe(
-  FinalizationRegistry,
-  class SafeFinalizationRegistry extends FinalizationRegistry {
-    // eslint-disable-next-line no-useless-constructor
-    constructor(cleanupCallback) { super(cleanupCallback); }
-  }
-);
-primordials.SafeWeakRef = makeSafe(
-  WeakRef,
-  class SafeWeakRef extends WeakRef {
-    // eslint-disable-next-line no-useless-constructor
-    constructor(target) { super(target); }
-  }
-);
-
-const SafePromise = makeSafe(
-  Promise,
-  class SafePromise extends Promise {
-    // eslint-disable-next-line no-useless-constructor
-    constructor(executor) { super(executor); }
-  }
-);
-
-primordials.PromisePrototypeCatch = (thisPromise, onRejected) =>
-  PromisePrototypeThen(thisPromise, undefined, onRejected);
-
-/**
- * Attaches a callback that is invoked when the Promise is settled (fulfilled or
- * rejected). The resolved value cannot be modified from the callback.
- * Prefer using async functions when possible.
- * @param {Promise<any>} thisPromise
- * @param {() => void) | undefined | null} onFinally The callback to execute
- *        when the Promise is settled (fulfilled or rejected).
- * @returns {Promise} A Promise for the completion of the callback.
- */
-primordials.SafePromisePrototypeFinally = (thisPromise, onFinally) =>
-  // Wrapping on a new Promise is necessary to not expose the SafePromise
-  // prototype to user-land.
-  new Promise((a, b) =>
-    new SafePromise((a, b) => PromisePrototypeThen(thisPromise, a, b))
-      .finally(onFinally)
-      .then(a, b)
-  );
-
-primordials.AsyncIteratorPrototype =
-  primordials.ReflectGetPrototypeOf(
-    primordials.ReflectGetPrototypeOf(
-      async function* () { }).prototype);
-
 ObjectSetPrototypeOf(primordials, null);
 ObjectFreeze(primordials);