diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1d89c82..ea5a75d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version-file: package.json
       - run: npm install
       - run: npx xo
 
@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version-file: package.json
       - run: npm install
       - run: npx tsd
 
@@ -31,6 +31,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version-file: package.json
       - run: npm install
       - run: npx ava
diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-publish.yml
index 8440108..acd82cf 100644
--- a/.github/workflows/npm-publish.yml
+++ b/.github/workflows/npm-publish.yml
@@ -19,10 +19,10 @@ jobs:
   NPM:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version-file: package.json
           registry-url: https://registry.npmjs.org
       - run: npm ci || npm install
       - uses: fregante/setup-git-user@v2
diff --git a/index.d.ts b/index.d.ts
index f450d50..919be71 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -7,17 +7,14 @@ Shortens a GitHub URL string.
 @example https://github.com/nodejs/node/tree/v0.12/doc becomes nodejs/node@<code>v0.12</code>
 
 */
-declare function shortenRepoUrl(url: string, currentUrl?: string): string;
+export default function shortenRepoUrl(url: string, currentUrl?: string): string;
 
-declare namespace shortenRepoUrl {
-	/**
-	Shortens a GitHub URL in a DOM anchor.
+/**
+Shortens a GitHub URL in a DOM anchor if the link label is not customized (i.e. if the `href` matches the `textContent`)
 
-	@param anchor An HTMLAnchorElement
-	@param url The GitHub URL to shorten.
-	@example https://github.com/nodejs/node/tree/v0.12/doc becomes nodejs/node@<code>v0.12</code>
+@param anchor An HTMLAnchorElement
+@param url The GitHub URL to shorten.
+@example<a href="https://github.com">https://github.com</a> becomes <a href="https://github.com">github.com</a>
 
-	*/
-	const applyToLink: (anchor: HTMLAnchorElement, url?: string) => void;
-}
-export = shortenRepoUrl;
+*/
+export function applyToLink(anchor: HTMLAnchorElement, url?: string): void;
diff --git a/index.js b/index.js
index 649d5fd..6b0e15e 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,4 @@
-const reservedPaths = require('github-reserved-names/reserved-names.json');
+import reservedNames from 'github-reserved-names/reserved-names.json' with { type: 'json' };
 
 const patchDiffRegex = /[.](patch|diff)$/;
 const releaseRegex = /^releases[/]tag[/]([^/]+)/;
@@ -43,7 +43,7 @@ function joinValues(array, delimiter = '/') {
 	return array.filter(Boolean).join(delimiter);
 }
 
-function shortenURL(href, currentUrl = 'https://github.com') {
+function shortenRepoUrl(href, currentUrl = 'https://github.com') {
 	if (!href) {
 		return;
 	}
@@ -101,12 +101,12 @@ function shortenURL(href, currentUrl = 'https://github.com') {
 
 	const isLocal = origin === currentUrl.origin;
 	const isThisRepo = (isLocal || isRaw || isRedirection) && currentRepo === `${user}/${repo}`;
-	const isReserved = reservedPaths.includes(user);
+	const isReserved = reservedNames.includes(user);
 	const isDependents = dependentsRegex.test(repoPath);
 	const isDependencies = dependenciesRegex.test(repoPath);
 	const [, diffOrPatch] = repoPath.match(patchDiffRegex) || [];
 	const [, release] = repoPath.match(releaseRegex) || [];
-	const [, releaseTag, releaseTagExt] = repoPath.match(releaseArchiveRegex) || [];
+	const [, releaseTag, releaseTagExtension] = repoPath.match(releaseArchiveRegex) || [];
 	const [, downloadTag, downloadFilename] = repoPath.match(releaseDownloadRegex) || [];
 	const [, label] = repoPath.match(labelRegex) || [];
 	const [, compare] = repoPath.match(compareRegex) || [];
@@ -114,7 +114,7 @@ function shortenURL(href, currentUrl = 'https://github.com') {
 	const [, issue] = isRedirection ? repoPath.match(issueRegex) || [] : [];
 	const [, commit] = isRedirection ? repoPath.match(commitRegex) || [] : [];
 	const [, wiki] = repoPath.match(wikiRegex) || [];
-	const isFileOrDir = revision && [
+	const isFileOrDirectory = revision && [
 		'raw',
 		'tree',
 		'blob',
@@ -139,7 +139,7 @@ function shortenURL(href, currentUrl = 'https://github.com') {
 		return `@${user}${search}${hash}`;
 	}
 
-	if (isFileOrDir) {
+	if (isFileOrDirectory) {
 		const revisioned = joinValues(
 			[joinValues([repoUrl, revision], '@'), filePath],
 			'/',
@@ -162,9 +162,9 @@ function shortenURL(href, currentUrl = 'https://github.com') {
 		return `${partial}${search}${hash} (release)`;
 	}
 
-	if (releaseTagExt) {
+	if (releaseTagExtension) {
 		const partial = joinValues([repoUrl, `<code>${releaseTag}</code>`], '@');
-		return `${partial}${releaseTagExt}${search}${hash}`;
+		return `${partial}${releaseTagExtension}${search}${hash}`;
 	}
 
 	if (downloadFilename) {
@@ -241,7 +241,7 @@ function shortenURL(href, currentUrl = 'https://github.com') {
 	return pathname.replaceAll(/^[/]|[/]$/g, '') + url.search + hash + query;
 }
 
-function applyToLink(a, currentUrl) {
+export function applyToLink(a, currentUrl) {
 	// Shorten only if the link name hasn't been customized.
 	// .href automatically adds a / to naked origins so that needs to be tested too
 	// `trim` makes it compatible with this feature: https://github.com/sindresorhus/refined-github/pull/3085
@@ -250,7 +250,7 @@ function applyToLink(a, currentUrl) {
 		(url === a.textContent.trim() || url === `${a.textContent}/`)
 		&& !a.firstElementChild
 	) {
-		const shortened = shortenURL(url, currentUrl);
+		const shortened = shortenRepoUrl(url, currentUrl);
 		a.innerHTML = shortened;
 		return true;
 	}
@@ -258,5 +258,4 @@ function applyToLink(a, currentUrl) {
 	return false;
 }
 
-module.exports = shortenURL;
-module.exports.applyToLink = applyToLink;
+export default shortenRepoUrl;
diff --git a/test.js b/index.test.js
similarity index 99%
rename from test.js
rename to index.test.js
index 18cc4b5..16742ce 100644
--- a/test.js
+++ b/index.test.js
@@ -1,5 +1,5 @@
-const test = require('ava');
-const shortenUrl = require('.');
+import test from 'ava';
+import shortenUrl from './index.js';
 
 const currentLocation = 'https://github.com/fregante/shorten-repo-url/issue/1';
 
diff --git a/package.json b/package.json
index 8a35596..d653874 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
 	"funding": "https://github.com/sponsors/fregante",
 	"license": "MIT",
 	"author": "Federico Brigante <me@fregante.com> (https://fregante.com)",
+	"type": "module",
 	"exports": "./index.js",
 	"main": "./index.js",
 	"types": "./index.d.ts",
@@ -30,6 +31,7 @@
 		"test": "xo && tsd && ava"
 	},
 	"xo": {
+		"parser": "@typescript-eslint/parser",
 		"rules": {
 			"unicorn/better-regex": "off",
 			"unicorn/prefer-module": "off",
@@ -40,12 +42,12 @@
 		"github-reserved-names": "^2.0.5"
 	},
 	"devDependencies": {
-		"@sindresorhus/tsconfig": "^4.0.0",
-		"ava": "^5.3.1",
-		"tsd": "^0.29.0",
-		"xo": "^0.56.0"
+		"@sindresorhus/tsconfig": "^5.0.0",
+		"ava": "^6.1.3",
+		"tsd": "^0.31.1",
+		"xo": "^0.58.0"
 	},
 	"engines": {
-		"node": ">=18"
+		"node": ">=20.10"
 	}
 }