diff --git a/types/animation.d.ts b/types/animation.d.ts
index 5e01acf..6fb372c 100644
--- a/types/animation.d.ts
+++ b/types/animation.d.ts
@@ -4,13 +4,7 @@ type AnimationFn = (player: PlayerObject, time: number) => void
 interface IAnimation {
   play(player: PlayerObject, time: number): void
 }
-export type Animation =
-  | AnimationFn
-  | IAnimation
-  | {
-    play(player: PlayerObject, time: number): void
-    [x: string]: any
-  }
+export type Animation = AnimationFn | IAnimation
 
 declare function invokeAnimation(
   animation: Animation,
diff --git a/types/skinview3d.d.ts b/types/skinview3d.d.ts
index 2836014..c6c854b 100644
--- a/types/skinview3d.d.ts
+++ b/types/skinview3d.d.ts
@@ -1,3 +1,11 @@
-export { CompositeAnimation, WalkAnimation, Animation } from './animation'
+export {
+  CompositeAnimation,
+  WalkAnimation,
+  Animation,
+  AnimationFn,
+  IAnimation
+} from './animation'
+
 export { SkinViewer, SkinControl } from './viewer'
+
 export { SkinObject, CapeObject, PlayerObject } from './model'