diff --git a/.commitlintrc.js b/.commitlintrc.cjs
similarity index 100%
rename from .commitlintrc.js
rename to .commitlintrc.cjs
diff --git a/doc/manual/usage.md b/doc/manual/usage.md
index a63f7b2..b9779a2 100644
--- a/doc/manual/usage.md
+++ b/doc/manual/usage.md
@@ -2,14 +2,14 @@
 The code needs a ES2015+ polyfill to work, for example
 [regenerator-runtime/runtime](https://babeljs.io/docs/usage/polyfill).
 ```js
-require( 'regenerator-runtime/runtime' ) ;
+await import( 'regenerator-runtime/runtime.js' ) ;
 // or
 import 'regenerator-runtime/runtime.js' ;
 ```
 
 Then
 ```js
-const persistent = require( '@functional-data-structure/persistent' ) ;
+const persistent = await import( '@functional-data-structure/persistent' ) ;
 // or
 import persistent from '@functional-data-structure/persistent' ;
 ```
diff --git a/package.json b/package.json
index b336c5c..96f4f02 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
     "structures"
   ],
   "sideEffects": false,
+  "type": "module",
   "source": "src/index.js",
   "main": "dist/index.cjs",
   "module": "dist/index.module.js",