diff --git a/rollup.config.js b/rollup.config.js
index a8ac2c8..f55dc7c 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -22,7 +22,11 @@ export default {
 	entry: 'src/rollup.js',
 	plugins: [
 		buble({
-			include: [ 'src/**', 'node_modules/acorn/**' ],
+			include: [ 'node_modules/acorn/**' ]
+		}),
+
+		buble({
+			include: [ 'src/**' ],
 			target: {
 				node: 4
 			}