diff --git a/threejs/three.d.ts b/threejs/three.d.ts
index 17ee6e0a9..c369e0d2b 100644
--- a/threejs/three.d.ts
+++ b/threejs/three.d.ts
@@ -1594,11 +1594,11 @@ declare module THREE {
 
         raycast(raycaster: Raycaster, intersects: any): void;
 
-        traverse(callback: (object: Object3D) => any): void;
+        traverse(callback: (object: Object3D) => void): void;
 
-        traverseVisible(callback: (object: Object3D) => any): void;
+        traverseVisible(callback: (object: Object3D) => void): void;
 
-        traverseAncestors(callback: (object: Object3D) => any): void;
+        traverseAncestors(callback: (object: Object3D) => void): void;
 
         /**
          * Updates local transform.