diff --git a/packages/func/package.json b/packages/func/package.json
index 9102d51..201f8d7 100644
--- a/packages/func/package.json
+++ b/packages/func/package.json
@@ -16,6 +16,7 @@
   "main": "lib/index.js",
   "module": "es/index.js",
   "typings": "es/index.d.ts",
+  "type": "module",
   "exports": {
     ".": {
       "require": "./lib/index.js",