diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 25f463c..38abcdf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,16 +54,16 @@ jobs:
               - 'package-lock.json'
               - '.github/workflows/ci.yml'
             aliases: [*shared, 'aliases/**']
-            core: [*shared, 'core/**', 'parsefiles/**', 'fixtures/**']
+            core: [*shared, 'core/**', 'fetchindex/**', 'parsefiles/**', 'fixtures/**']
             fetchindex: [*shared, 'fetchindex/**']
             fixtures: [*shared, 'fixtures/**']
-            newest: [*shared, 'newest/**', 'core/**', 'parsefiles/**', 'fixtures/**']
-            oldest: [*shared, 'oldest/**', 'core/**', 'parsefiles/**', 'fixtures/**']
+            newest: [*shared, 'newest/**', 'core/**', 'fetchindex/**', 'parsefiles/**', 'fixtures/**']
+            oldest: [*shared, 'oldest/**', 'core/**', 'fetchindex/**', 'parsefiles/**', 'fixtures/**']
             opt: [*shared, 'opt/**']
             parsefiles: [*shared, 'parsefiles/**', 'fixtures/**']
-            ranges: [*shared, 'ranges/**', 'core/**', 'aliases/**', 'parsefiles/**', 'fixtures/**']
-            static: [*shared, 'static/**', 'core/**', 'parsefiles/**', 'fixtures/**']
-            translate: [*shared, 'translate/**', 'ranges/**', 'core/**', 'aliases/**', 'parsefiles/**', 'fixtures/**']
+            ranges: [*shared, 'ranges/**', 'core/**', 'aliases/**', 'fetchindex/**', 'parsefiles/**', 'fixtures/**']
+            static: [*shared, 'static/**', 'core/**', 'fetchindex/**', 'parsefiles/**', 'fixtures/**']
+            translate: [*shared, 'translate/**', 'ranges/**', 'core/**', 'aliases/**', 'fetchindex/**', 'parsefiles/**', 'fixtures/**']
             # the site shows core's version, which every release bumps
             docs: [*shared, 'docs/**', 'doc-kit.config.mjs', 'core/package.json', '.github/workflows/docs.yml']
             workflows: ['.github/**']
diff --git a/core/index.js b/core/index.js
index 2f8eba9..2871e82 100644
--- a/core/index.js
+++ b/core/index.js
@@ -2,7 +2,7 @@ const { DateTime } = require('luxon');
 const semver = require('semver');
 const parsefiles = require('@nodevu/parsefiles');
 const optionsParser = require('./util/prod/optionsParser');
-const versionFetcher = require('./util/prod/versions');
+const versionFetcher = require('@nodevu/fetchindex');
 const scheduleFetcher = require('./util/prod/schedule');
 
 /**
diff --git a/core/package.json b/core/package.json
index 95301b9..54ef532 100644
--- a/core/package.json
+++ b/core/package.json
@@ -18,6 +18,7 @@
 		"/types"
 	],
 	"dependencies": {
+		"@nodevu/fetchindex": "^1.1.0",
 		"@nodevu/parsefiles": "^1.1.0",
 		"@types/luxon": "^3.7.6",
 		"luxon": "^3.5.0",
diff --git a/core/test/versions.js b/core/test/versions.js
deleted file mode 100644
index cbe167d..0000000
--- a/core/test/versions.js
+++ /dev/null
@@ -1,105 +0,0 @@
-const { deepStrictEqual, match, ok, rejects } = require('node:assert');
-const { describe, it } = require('node:test');
-const undici = require('undici');
-const versions = require('../util/prod/versions');
-const optionsParser = require('../util/prod/optionsParser');
-
-// undici's types only take its own Request class, so they don't match the
-// global fetch's type even though it works as one
-const undiciFetch = /** @type {typeof fetch} */ (
-	/** @type {unknown} */ (undici.fetch)
-);
-
-/** @typedef {import('../util/prod/optionsParser').ParsedOptions} ParsedOptions */
-
-// checks that verify the result of data returned
-/** @param {import('../util/prod/versions').IndexRelease[]} data */
-function check(data) {
-	// the newest release can be a prerelease, like v27.0.0-alpha.0.0.0
-	match(data[0].version, /^v\d+\.\d+\.\d+(-[0-9A-Za-z.-]+)?$/);
-	match(data[0].date, /^\d{4}-\d{2}-\d{2}$/);
-	deepStrictEqual(Array.isArray(data[0].files), true);
-	ok(
-		data[0].npm &&
-			data[0].v8 &&
-			data[0].uv &&
-			data[0].zlib &&
-			data[0].openssl &&
-			data[0].modules,
-	);
-	match(data[0].npm, /^\d+\.\d+\.\d+/);
-	match(data[0].v8, /^\d+\.\d+\.\d+/);
-	match(data[0].uv, /^\d+\.\d+\.\d+/);
-	match(data[0].zlib, /^\d+\.\d+/);
-	match(data[0].openssl, /^\d+\.\d+\.\d+/);
-	match(data[0].modules, /^\d+$/);
-	// index.json has false for non-LTS releases and the line's codename for LTS
-	// ones
-	deepStrictEqual(
-		data[0].lts === false || /^[A-Z][a-z]+$/.test(data[0].lts),
-		true,
-	);
-	deepStrictEqual([true, false].includes(data[0].security), true);
-}
-
-// set up options object that would normally be passed to the module. the
-// module only reads fetch and its own URL
-const options = /** @type {ParsedOptions} */ ({
-	fetch: globalThis.fetch,
-	urls: {
-		index: 'https://nodejs.org/dist/index.json',
-	},
-});
-
-describe('under normal condiditons, versions should work', async () => {
-	it('should work with default options', async () => {
-		const data = await versions(options);
-		check(data);
-	});
-
-	it('should work with Undici fetch', async () => {
-		options.fetch = undiciFetch;
-		const data = await versions(options);
-		check(data);
-	});
-});
-
-describe('versions should work with optionsParser', async () => {
-	it('should work with the default output of optionsParser', async () => {
-		const parsedOptions = optionsParser({});
-		const data = await versions(parsedOptions);
-		check(data);
-	});
-
-	it('should work with a different fetch passed to optionsParser', async () => {
-		const parsedOptions = optionsParser({
-			fetch: undiciFetch,
-		});
-
-		const data = await versions(parsedOptions);
-		check(data);
-	});
-});
-
-describe('versions', async () => {
-	it('should reject naming the URL and status when the response is not ok', async () => {
-		// Arrange
-		const url = 'https://nodejs.org/dist/index.json';
-
-		// Act
-		const result = versions(
-			/** @type {ParsedOptions} */ ({ fetch: notFound, urls: { index: url } }),
-		);
-
-		// Assert
-		await rejects(result, {
-			message: `Fetching ${url} failed: 404 Not Found`,
-		});
-	});
-});
-
-// Helpers
-
-/** @type {typeof fetch} */
-const notFound = async () =>
-	new Response('Not Found', { status: 404, statusText: 'Not Found' });
diff --git a/core/tsconfig.json b/core/tsconfig.json
index 78be28d..dd1dcf9 100644
--- a/core/tsconfig.json
+++ b/core/tsconfig.json
@@ -1,5 +1,5 @@
 {
 	"extends": "../tsconfig.base.json",
 	"include": ["index.js", "util/prod/*.js"],
-	"references": [{ "path": "../parsefiles" }]
+	"references": [{ "path": "../fetchindex" }, { "path": "../parsefiles" }]
 }
diff --git a/core/types/util/prod/versions.d.ts b/core/types/util/prod/versions.d.ts
deleted file mode 100644
index dd81f75..0000000
--- a/core/types/util/prod/versions.d.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-/**
- * A release as the Node.js release index lists it.
- *
- * @typedef {object} IndexRelease
- * @property {string} version Such as `'v17.6.0'`.
- * @property {string} date
- * @property {string[]} files
- * @property {string} [npm]
- * @property {string} [v8]
- * @property {string} [uv]
- * @property {string} [zlib]
- * @property {string} [openssl]
- * @property {string} [modules]
- * @property {string | false} lts The LTS codename, or `false`.
- * @property {boolean} security
- */
-export = versions;
-export type IndexRelease = {
-    /**
-     * Such as `'v17.6.0'`.
-     */
-    version: string;
-    date: string;
-    files: string[];
-    npm?: string;
-    v8?: string;
-    uv?: string;
-    zlib?: string;
-    openssl?: string;
-    modules?: string;
-    /**
-     * The LTS codename, or `false`.
-     */
-    lts: string | false;
-    security: boolean;
-};
-/**
- * @param {import('./optionsParser').ParsedOptions} options
- * @returns {Promise<IndexRelease[]>}
- */
-declare function versions(options: import('./optionsParser').ParsedOptions): Promise<IndexRelease[]>;
diff --git a/core/util/prod/versions.js b/core/util/prod/versions.js
deleted file mode 100644
index f6bce85..0000000
--- a/core/util/prod/versions.js
+++ /dev/null
@@ -1,39 +0,0 @@
-/**
- * A release as the Node.js release index lists it.
- *
- * @typedef {object} IndexRelease
- * @property {string} version Such as `'v17.6.0'`.
- * @property {string} date
- * @property {string[]} files
- * @property {string} [npm]
- * @property {string} [v8]
- * @property {string} [uv]
- * @property {string} [zlib]
- * @property {string} [openssl]
- * @property {string} [modules]
- * @property {string | false} lts The LTS codename, or `false`.
- * @property {boolean} security
- */
-
-/**
- * @param {import('./optionsParser').ParsedOptions} options
- * @returns {Promise<IndexRelease[]>}
- */
-async function versions(options) {
-	// parse our options and set up fetch if a custom fetch is passed
-	const fetch = options.fetch;
-	const url = options.urls.index;
-
-	// fetch the url, get the json from the fetched URL that we're going to use
-	const raw = await fetch(url);
-
-	if (!raw.ok) {
-		throw new Error(`Fetching ${url} failed: ${raw.status} ${raw.statusText}`);
-	}
-
-	const versions = await raw.json();
-
-	return versions;
-}
-
-module.exports = versions;
diff --git a/package-lock.json b/package-lock.json
index 392344e..3f916df 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -56,6 +56,7 @@
 			"version": "1.1.0",
 			"license": "MIT",
 			"dependencies": {
+				"@nodevu/fetchindex": "^1.1.0",
 				"@nodevu/parsefiles": "^1.1.0",
 				"@types/luxon": "^3.7.6",
 				"luxon": "^3.5.0",