diff --git a/rollup.config.js b/rollup.config.js
index 2656574..ef0305c 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -6,7 +6,12 @@ export default {
   plugins: [
     babel({
       exclude: 'node_modules/**',
-      presets: ['es2015-rollup']
+      presets: [
+        [ "es2015", { "modules": false } ]
+      ],
+      plugins: [
+        "external-helpers"
+      ]
     })
   ],
   format: 'umd',