diff --git a/package.json b/package.json
index 657c7a42..93204892 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,8 @@
   "types": "lib-esm/index.d.ts",
   "files": [
     "lib",
-    "lib-esm"
+    "lib-esm",
+    "src"
   ],
   "scripts": {
     "build": "npm run clean && npm run build-ts",