diff --git a/rollup.config.js b/rollup.config.js
index 4de726a..2db192a 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -17,7 +17,8 @@ const plugins = [
   commonjs(),
   vue(),
   buble({
-    transforms: { forOf: false },
+    // transforms: { forOf: false },
+    objectAssign: 'Object.assign',
   }),
 ];
 
diff --git a/src/core/useThree.js b/src/core/useThree.js
index 614b917..df6426f 100644
--- a/src/core/useThree.js
+++ b/src/core/useThree.js
@@ -68,9 +68,9 @@ export default function useThree() {
    */
   function init(params) {
     if (params) {
-      for (const [key, value] of Object.entries(params)) {
+      Object.entries(params).forEach(([key, value]) => {
         conf[key] = value;
-      }
+      });
     }
 
     if (!obj.scene) {
@@ -88,9 +88,9 @@ export default function useThree() {
     if (conf.orbit_ctrl) {
       obj.orbitCtrl = new OrbitControls(obj.camera, obj.renderer.domElement);
       if (conf.orbit_ctrl instanceof Object) {
-        for (const [key, value] of Object.entries(conf.orbit_ctrl)) {
+        Object.entries(conf.orbit_ctrl).forEach(([key, value]) => {
           obj.orbitCtrl[key] = value;
-        }
+        });
       }
     }
 
diff --git a/src/materials/SubSurfaceMaterial.js b/src/materials/SubSurfaceMaterial.js
index 347d3be..467327a 100644
--- a/src/materials/SubSurfaceMaterial.js
+++ b/src/materials/SubSurfaceMaterial.js
@@ -1,6 +1,6 @@
 import { Color, ShaderMaterial as TShaderMaterial, UniformsUtils } from 'three';
-import ShaderMaterial from './ShaderMaterial.js';
 import SubsurfaceScatteringShader from './SubsurfaceScatteringShader.js';
+import ShaderMaterial from './ShaderMaterial.js';
 
 export default {
   extends: ShaderMaterial,
diff --git a/src/tools.js b/src/tools.js
index 39d7132..23efd52 100644
--- a/src/tools.js
+++ b/src/tools.js
@@ -1,8 +1,8 @@
 export function setFromProp(o, prop) {
   if (prop instanceof Object) {
-    for (const [key, value] of Object.entries(prop)) {
+    Object.entries(prop).forEach(([key, value]) => {
       o[key] = value;
-    }
+    });
   }
 };