diff --git a/package.json b/package.json
index 5d2a668a..2596c608 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
   "files": [
     "LICENSE",
     "index.js",
+    "index.mjs",
     "bin"
   ],
   "bin": {