diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..b8fa91e
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,14 @@
+# editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+max_line_length = 120
+
+[*.md]
+trim_trailing_whitespace = false
diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 4dcf981..15c7916 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -39,6 +39,6 @@ jobs:
     - run: npm run lint
       name: Run linter
     - run: npm run format:check
-      name: Run Prettier check
+      name: Run format check
     - run: npm run test
       name: Run unit tests
diff --git a/.releaserc b/.releaserc
deleted file mode 100644
index 93cf006..0000000
--- a/.releaserc
+++ /dev/null
@@ -1,37 +0,0 @@
-{
-  "plugins": [
-    ["@semantic-release/commit-analyzer", {
-      "preset": "angular",
-      "releaseRules": [
-        {"type": "chore", "release": "patch"}
-      ]
-    }],
-    ["@semantic-release/release-notes-generator", {
-      "preset": "conventionalcommits",
-      "presetConfig": {
-        "types": [
-          {"type": "feat", "section": "Features"},
-          {"type": "fix", "section": "Bug Fixes"},
-          {"type": "perf", "section": "Performance Improvements"},
-          {"type": "revert", "section": "Reverts"},
-          {"type": "chore", "section": "Miscellaneous Chores"},
-          {"type": "refactor", "section": "Code Refactoring"},
-          {"type": "docs", "section": "Documentation", "hidden": true},
-          {"type": "style", "section": "Styles", "hidden": true},
-          {"type": "test", "section": "Tests", "hidden": true},
-          {"type": "build", "section": "Build System", "hidden": true},
-          {"type": "ci", "section": "Continuous Integration", "hidden": true}
-        ]
-      }
-    }],
-    ["@semantic-release/changelog", {
-      "changelogFile": "CHANGELOG.md"
-    }],
-    "@semantic-release/npm",
-    ["@semantic-release/git", {
-      "assets": ["docs", "package.json", "CHANGELOG.md"],
-      "message": "chore(release): ${nextRelease.version} [skip ci]\n\n${nextRelease.notes}"
-    }],
-    "@semantic-release/github"
-  ]
-}
diff --git a/README.md b/README.md
index 3cb60ad..f41833c 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,8 @@ A collection of ES7 async/await utilities. Install via NPM:
 npm install asyncbox
 ```
 
+Published as both ESM and CommonJS, so `import {sleep} from 'asyncbox'` and `const {sleep} = require('asyncbox')` both work.
+
 Then, behold!
 
 ### Sleep
diff --git a/eslint.config.mjs b/eslint.config.mjs
deleted file mode 100644
index b963381..0000000
--- a/eslint.config.mjs
+++ /dev/null
@@ -1,15 +0,0 @@
-import appiumConfig from '@appium/eslint-config-appium-ts';
-import {defineConfig, globalIgnores} from 'eslint/config';
-
-export default defineConfig([
-  {
-    extends: [appiumConfig],
-  },
-  {
-    files: ['test/**/*.{js,ts}'],
-    rules: {
-      'func-names': 'off'
-    }
-  },
-  globalIgnores(['build']),
-]);
diff --git a/lib/asyncbox.ts b/lib/asyncbox.ts
index 18fa183..b078811 100644
--- a/lib/asyncbox.ts
+++ b/lib/asyncbox.ts
@@ -1,4 +1,5 @@
 import {limitFunction} from 'p-limit';
+
 import type {
   CancellablePromise,
   LongSleepOptions,
diff --git a/oxfmt.config.mjs b/oxfmt.config.mjs
new file mode 100644
index 0000000..4752f81
--- /dev/null
+++ b/oxfmt.config.mjs
@@ -0,0 +1,6 @@
+import appiumConfig, {defineConfig, ignorePatterns} from '@appium/oxc-config/oxfmt';
+
+export default defineConfig({
+  ...appiumConfig,
+  ignorePatterns: [...ignorePatterns],
+});
diff --git a/oxlint.config.mjs b/oxlint.config.mjs
new file mode 100644
index 0000000..34ea238
--- /dev/null
+++ b/oxlint.config.mjs
@@ -0,0 +1,6 @@
+import appiumConfig, {defineConfig, ignorePatterns} from '@appium/oxc-config/oxlint';
+
+export default defineConfig({
+  extends: [appiumConfig],
+  ignorePatterns: [...ignorePatterns],
+});
diff --git a/package.json b/package.json
index 85e35fe..5513b6f 100644
--- a/package.json
+++ b/package.json
@@ -1,64 +1,74 @@
 {
   "name": "asyncbox",
-  "description": "A collection of small async/await utilities",
-  "tags": [
-    "async/await",
-    "es7",
-    "async"
-  ],
   "version": "6.3.5",
-  "author": "jlipps@gmail.com",
+  "description": "A collection of small async/await utilities",
+  "bugs": {
+    "url": "https://github.com/appium/asyncbox/issues"
+  },
   "license": "Apache-2.0",
+  "author": "jlipps@gmail.com",
   "repository": {
     "type": "git",
     "url": "https://github.com/appium/asyncbox.git"
   },
-  "bugs": {
-    "url": "https://github.com/appium/asyncbox/issues"
-  },
-  "engines": {
-    "node": "^20.19.0 || ^22.12.0 || >=24.0.0",
-    "npm": ">=10"
-  },
-  "main": "./build/lib/asyncbox.js",
   "bin": {},
   "directories": {
     "lib": "./lib"
   },
   "files": [
     "lib/**/*",
-    "build/lib/**/*"
+    "build/cjs/lib/**/*",
+    "build/cjs/package.json",
+    "build/esm/lib/**/*",
+    "build/esm/package.json"
   ],
+  "type": "module",
+  "main": "./build/cjs/lib/asyncbox.js",
+  "module": "./build/esm/lib/asyncbox.js",
+  "types": "./build/cjs/lib/asyncbox.d.ts",
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./build/esm/lib/asyncbox.d.ts",
+        "default": "./build/esm/lib/asyncbox.js"
+      },
+      "require": {
+        "types": "./build/cjs/lib/asyncbox.d.ts",
+        "default": "./build/cjs/lib/asyncbox.js"
+      }
+    },
+    "./package.json": "./package.json"
+  },
   "scripts": {
-    "build": "tsc -b",
+    "build": "tsc -b tsconfig.esm.json tsconfig.cjs.json",
+    "postbuild": "node scripts/postbuild.mjs",
     "clean": "npm run build -- --clean",
     "rebuild": "npm run clean; npm run build",
     "dev": "npm run build -- --watch",
     "prepare": "npm run rebuild",
-    "test": "node --test --enable-source-maps --test-force-exit --test-timeout=60000 \"./build/test/**/*.spec.js\"",
-    "lint": "eslint .",
-    "format": "prettier -w ./lib ./test",
-    "format:check": "prettier --check ./lib ./test",
+    "test": "node --test --enable-source-maps --test-force-exit --test-timeout=60000 \"./build/esm/test/**/*.spec.js\" \"./test/*.spec.cjs\"",
+    "lint": "oxlint -c oxlint.config.mjs .",
+    "lint:fix": "oxlint -c oxlint.config.mjs --fix .",
+    "format": "oxfmt -c oxfmt.config.mjs .",
+    "format:check": "oxfmt -c oxfmt.config.mjs --check .",
     "watch": "npm run dev"
   },
-  "prettier": {
-    "bracketSpacing": false,
-    "printWidth": 100,
-    "singleQuote": true
-  },
   "dependencies": {
     "p-limit": "^7.2.0"
   },
   "devDependencies": {
-    "@appium/eslint-config-appium-ts": "^3.2.3",
-    "@appium/tsconfig": "^1.0.0",
-    "@semantic-release/changelog": "^6.0.1",
-    "@semantic-release/git": "^10.0.1",
-    "@types/node": "^26.1.0",
-    "conventional-changelog-conventionalcommits": "^9.0.0",
-    "prettier": "^3.0.0",
-    "semantic-release": "^25.0.2",
-    "typescript": "^6.0.3"
+    "@appium/oxc-config": "^1.1.0",
+    "@appium/semantic-release-config": "^1.1.0",
+    "@appium/tsconfig": "^1.2.0",
+    "@types/node": "^26.1.0"
+  },
+  "engines": {
+    "node": "^20.19.0 || ^22.12.0 || >=24.0.0",
+    "npm": ">=10"
   },
-  "types": "./build/lib/asyncbox.d.ts"
+  "tags": [
+    "async/await",
+    "es7",
+    "async"
+  ]
 }
diff --git a/release.config.mjs b/release.config.mjs
new file mode 100644
index 0000000..83f3400
--- /dev/null
+++ b/release.config.mjs
@@ -0,0 +1,3 @@
+import releaseConfig from '@appium/semantic-release-config';
+
+export default releaseConfig();
diff --git a/scripts/postbuild.mjs b/scripts/postbuild.mjs
new file mode 100644
index 0000000..1b0f9cf
--- /dev/null
+++ b/scripts/postbuild.mjs
@@ -0,0 +1,9 @@
+import {mkdirSync, writeFileSync} from 'node:fs';
+
+for (const [dir, type] of [
+  ['build/esm', 'module'],
+  ['build/cjs', 'commonjs'],
+]) {
+  mkdirSync(dir, {recursive: true});
+  writeFileSync(`${dir}/package.json`, `${JSON.stringify({type}, null, 2)}\n`);
+}
diff --git a/test/asyncbox.spec.ts b/test/asyncbox.spec.ts
index 7114455..3379ec9 100644
--- a/test/asyncbox.spec.ts
+++ b/test/asyncbox.spec.ts
@@ -1,3 +1,6 @@
+import assert from 'node:assert/strict';
+import {it, describe, beforeEach} from 'node:test';
+
 import {
   sleep,
   longSleep,
@@ -11,8 +14,6 @@ import {
   PromiseCancellationError,
   type SleepOptions,
 } from '../lib/asyncbox.js';
-import {it, describe, beforeEach} from 'node:test';
-import assert from 'node:assert/strict';
 
 describe('sleep', function () {
   it('should work like setTimeout', async function () {
@@ -93,10 +94,7 @@ describe('sleep', function () {
     assert.throws(() => sleep([] as unknown as number), /finite number or an object with ms/);
   });
   it('should throw TypeError when object has invalid ms', function () {
-    assert.throws(
-      () => sleep({} as unknown as SleepOptions),
-      /options\.ms must be a finite number/,
-    );
+    assert.throws(() => sleep({} as unknown as SleepOptions), /options\.ms must be a finite number/);
     assert.throws(() => sleep({ms: Number.NaN}), /options\.ms must be a finite number/);
   });
   it('should accept a null-prototype object with ms', async function () {
@@ -309,7 +307,7 @@ describe('retry', function () {
       assert.ok(err);
       assert.strictEqual(err!.message, 'not ok yet');
       assert.strictEqual(eventuallyOkFnCalls, 3);
-      assert.ok(Date.now() - start >= 30);
+      assert.ok(Date.now() - start >= 29);
 
       // rerun with ok number of calls
       start = Date.now();
@@ -317,7 +315,7 @@ describe('retry', function () {
       const res = await retryInterval(3, 15, eventuallyOkNoSleepFn, 3);
       assert.strictEqual(eventuallyOkFnCalls, 3);
       assert.strictEqual(res, 9);
-      assert.ok(Date.now() - start >= 30);
+      assert.ok(Date.now() - start >= 29);
     });
     it('should not wait on the final error', async function () {
       const start = Date.now();
@@ -375,7 +373,7 @@ describe('asyncmap', function () {
   it('should map elements one at a time', async function () {
     const start = Date.now();
     assert.deepStrictEqual(await asyncmap(coll, mapper, false), newColl);
-    assert.ok(Date.now() - start >= 50);
+    assert.ok(Date.now() - start >= 49);
   });
   it('should map elements in parallel', async function () {
     const start = Date.now();
@@ -386,7 +384,7 @@ describe('asyncmap', function () {
     const start = Date.now();
     assert.deepStrictEqual(await asyncmap(coll, mapper, {concurrency: 2}), newColl);
     assert.ok(Date.now() - start >= 29);
-    assert.ok(Date.now() - start <= 40);
+    assert.ok(Date.now() - start <= 60);
   });
   it('should handle an empty array', async function () {
     assert.deepStrictEqual(await asyncmap([], mapper, false), []);
@@ -414,7 +412,7 @@ describe('asyncfilter', function () {
   it('should filter elements one at a time', async function () {
     const start = Date.now();
     assert.deepStrictEqual(await asyncfilter(coll, filter, false), newColl);
-    assert.ok(Date.now() - start >= 50);
+    assert.ok(Date.now() - start >= 49);
   });
   it('should filter elements in parallel', async function () {
     const start = Date.now();
@@ -425,7 +423,7 @@ describe('asyncfilter', function () {
     const start = Date.now();
     assert.deepStrictEqual(await asyncfilter(coll, filter, {concurrency: 2}), newColl);
     assert.ok(Date.now() - start >= 29);
-    assert.ok(Date.now() - start <= 40);
+    assert.ok(Date.now() - start <= 60);
   });
   it('should handle an empty array', async function () {
     assert.deepStrictEqual(await asyncfilter([], filter, false), []);
diff --git a/test/cjs-interop.spec.cjs b/test/cjs-interop.spec.cjs
new file mode 100644
index 0000000..f24bbb0
--- /dev/null
+++ b/test/cjs-interop.spec.cjs
@@ -0,0 +1,9 @@
+const assert = require('node:assert/strict');
+const {test} = require('node:test');
+const asyncbox = require('../build/cjs/lib/asyncbox.js');
+
+test('require() interop with the CJS build', async () => {
+  assert.equal(typeof asyncbox.sleep, 'function');
+  assert.equal(typeof asyncbox.retry, 'function');
+  await asyncbox.sleep(1);
+});
diff --git a/tsconfig.cjs.json b/tsconfig.cjs.json
new file mode 100644
index 0000000..f750934
--- /dev/null
+++ b/tsconfig.cjs.json
@@ -0,0 +1,9 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "build/cjs",
+    "module": "CommonJS",
+    "moduleResolution": "Bundler"
+  }
+}
diff --git a/tsconfig.esm.json b/tsconfig.esm.json
new file mode 100644
index 0000000..30361d7
--- /dev/null
+++ b/tsconfig.esm.json
@@ -0,0 +1,7 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "build/esm"
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
index 6865db8..745b79a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,12 +3,9 @@
   "extends": "@appium/tsconfig/tsconfig.json",
   "compilerOptions": {
     "strict": true,
-    "outDir": "build",
     "types": ["node"],
     "checkJs": true
   },
-  "include": [
-    "lib",
-    "test"
-  ]
+  "include": ["lib", "test"],
+  "exclude": ["test/*.cjs"]
 }