diff --git a/rollup.config.mjs b/rollup.config.mjs
index b765ce4..7e16bab 100644
--- a/rollup.config.mjs
+++ b/rollup.config.mjs
@@ -12,7 +12,8 @@ const config = {
     {
       file: "dist/index.umd.cjs",
       format: "umd",
-      name: "JsonKit",
+      name: "window",
+      extend: true,
     },
   ],
   plugins: [