diff --git a/package.json b/package.json
index 0bcabb4..a66c5fd 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,8 @@
     "bundle": "microbundle --target node --generateTypes false --sourcemap false --format esm,cjs",
     "lint": "eslint .",
     "lint:types": "tsc --noEmit",
-    "test": "mocha test/spec/*.{cjs,js}"
+    "test": "mocha test/spec/*.{cjs,js}",
+    "prepare": "npm run bundle"
   },
   "type": "module",
   "source": "./src/index.js",