diff --git a/example/three/sandbox/index.html b/example/three/sandbox/index.html
index d8d9773..b974a3e 100644
--- a/example/three/sandbox/index.html
+++ b/example/three/sandbox/index.html
@@ -36,6 +36,8 @@
 			import { VRButton } from 'three/addons/webxr/VRButton.js';
 			import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
 			import { FBXLoader } from 'three/addons/loaders/FBXLoader.js';
+			import { USDZLoader } from 'three/addons/loaders/USDZLoader.js';
+			import { OBJLoader } from 'three/addons/loaders/OBJLoader.js';
 			import { HTMLMesh } from 'three/addons/interactive/HTMLMesh.js';
 			import { InteractiveGroup } from 'three/addons/interactive/InteractiveGroup.js';
 			import { XRControllerModelFactory } from 'three/addons/webxr/XRControllerModelFactory.js';