diff --git a/package.json b/package.json
index 847fa5d..fbc8e90 100644
--- a/package.json
+++ b/package.json
@@ -42,12 +42,23 @@
   ],
   "license": "ISC",
   "main": "index.js",
+  "module": "index.esm.mjs",
+  "exports": {
+    "require": "./index.js",
+    "import": "./index.esm.mjs"
+  },
+  "files": [
+    "index.js",
+    "index.esm.mjs"
+  ],  
   "repository": {
     "type": "git",
     "url": "https://github.com/ungoldman/changelog-parser.git"
   },
   "scripts": {
     "release": "gh-release && npm publish",
-    "test": "standard && node test | tap-spec"
+    "test": "standard && node test | tap-spec",
+    "build": "cp index.js index.esm.mjs && sed -i 's/module.exports =/export default/' index.esm.mjs",
+    "prepublishOnly": "npm build && npm test"
   }
 }