diff --git a/demo/rollup.config.js b/demo/rollup.config.js
index e267034d..d7acfe96 100644
--- a/demo/rollup.config.js
+++ b/demo/rollup.config.js
@@ -11,7 +11,7 @@ export default bundles.map(bundle => {
             sourcemap: true,
         },
         plugins: [
-            resolve({ jsnext: true, main: true }),
+            resolve({ mainFields: ["jsnext"] }),
             commonjs()
         ],
         external: ['reflect-metadata', 'doric'],