diff --git a/package.json b/package.json
index 3af3fca..fa55e33 100644
--- a/package.json
+++ b/package.json
@@ -50,6 +50,7 @@
   "bin": {
     "po2json": "bin/po2json"
   },
+  "main": "index.js",
   "engines": {
     "node": ">=10.0"
   },