diff --git a/package.json b/package.json
index 0663a26..3c1e27c 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
     "name": "@lumeweb/interface-relay",
     "version": "0.0.2-develop.2",
     "main": "lib/index.js",
+    "type": "module",
     "types": "lib/index.d.ts",
     "module": "lib/index.mjs",
     "exports": {