diff --git a/src/index.js b/src/index.js
index 2732033..85146f4 100644
--- a/src/index.js
+++ b/src/index.js
@@ -35,7 +35,7 @@ const copyFiles = params => {
 export default function(options) {
   return {
     name,
-    onwrite: () => {
+    generateBundle() {
       if (Array.isArray(options)) {
         options.forEach(option => {
           copyFiles(option)