diff --git a/src/skinview3d.ts b/src/skinview3d.ts
index 8080fde..f12cc7f 100644
--- a/src/skinview3d.ts
+++ b/src/skinview3d.ts
@@ -20,8 +20,11 @@ export {
 	AnimationFn,
 	Animation,
 	invokeAnimation,
+
+	SubAnimationHandle,
 	AnimationHandle,
 	CompositeAnimation,
+	RootAnimation,
 
 	WalkingAnimation,
 	RunningAnimation,
diff --git a/src/viewer.ts b/src/viewer.ts
index 16c78cd..c4a2146 100644
--- a/src/viewer.ts
+++ b/src/viewer.ts
@@ -16,7 +16,7 @@ export interface SkinViewerOptions {
 export class SkinViewer {
 
 	public readonly domElement: Node;
-	public readonly animations: RootAnimation;
+	public readonly animations: RootAnimation = new RootAnimation();
 	public detectModel: boolean = true;
 	public disposed: boolean = false;
 
@@ -111,7 +111,6 @@ export class SkinViewer {
 		if (options.width) this.width = options.width;
 		if (options.height) this.height = options.height;
 
-		this.animations = new RootAnimation();
 		const draw = () => {
 			if (this.disposed) return;
 			window.requestAnimationFrame(draw);