diff --git a/threejs/three.d.ts b/threejs/three.d.ts
index a9c33693c..9408fad57 100644
--- a/threejs/three.d.ts
+++ b/threejs/three.d.ts
@@ -2378,7 +2378,7 @@ declare module THREE {
 
         set(min: Vector2, max: Vector2): Box2;
         setFromPoints(points: Vector2[]): Box2;
-        setFromCenterAndSize(center: Vector2, size: number): Box2;
+        setFromCenterAndSize(center: Vector2, size: Vector2): Box2;
         copy(box: Box2): Box2;
         makeEmpty(): Box2;
         empty(): boolean;
@@ -2408,7 +2408,7 @@ declare module THREE {
 
         set(min: Vector3, max: Vector3): Box3;
         setFromPoints(points: Vector3[]): Box3;
-        setFromCenterAndSize(center: Vector3, size: number): Box3;
+        setFromCenterAndSize(center: Vector3, size: Vector3): Box3;
         setFromObject(object: Object3D): Box3;
         copy(box: Box3): Box3;
         makeEmpty(): Box3;
@@ -5604,7 +5604,7 @@ declare module THREE {
         cone: Mesh;
 
         setDirection(dir: Vector3): void;
-        setLength(length: number): void;
+        setLength(length: number,  headLength?: number, headWidth?: number): void;
         setColor(hex: number): void;
     }