diff --git a/modules/index.js b/modules/index.js
index aaac8bf..e333a51 100644
--- a/modules/index.js
+++ b/modules/index.js
@@ -1,4 +1,4 @@
-import tslib from '../tslib.js';
+import * as tslib from '../tslib.js';
 const {
     __extends,
     __assign,
diff --git a/package.json b/package.json
index 29c903b..59a6f89 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,7 @@
         "type": "git",
         "url": "https://github.com/Microsoft/tslib.git"
     },
+    "type":"module",
     "main": "tslib.js",
     "module": "tslib.es6.js",
     "jsnext:main": "tslib.es6.js",