diff --git a/javascript/index.mjs b/javascript/index.js
similarity index 95%
rename from javascript/index.mjs
rename to javascript/index.js
index d116de6..b3d5030 100644
--- a/javascript/index.mjs
+++ b/javascript/index.js
@@ -1,4 +1,4 @@
-export const CacheESLintConfig = {
+module.exports = {
   languageOptions: { globals: { Stimulus: 'readonly' } },
   ignores: ['**/vendor/**/*.js'],
   rules: {
diff --git a/javascript/package.json b/javascript/package.json
index 3381369..0924c1a 100644
--- a/javascript/package.json
+++ b/javascript/package.json
@@ -2,7 +2,7 @@
   "name": "eslint-config-cache-ventures",
   "version": "2.0.1",
   "description": "Cache Venture's ESLint config.",
-  "module": "index.mjs",
+  "main": "index.js",
   "homepage": "https://github.com/cacheventures/code-style",
   "repository": {
     "type": "git",