Vector3.Slerp bumping problem

Hello,

I made a script to add a more realistic movement on my flashlight. it works well, but it's not smooth enough. Here's a video I uploaded to show you the problem. video

Notice how the flashlight doesn't move smoothly.

Here's my script

 #pragma strict
 var target : GameObject;
 var speed : float;
 function Start () {
 }
 
 function Update () {
     transform.position = Vector3.Slerp(transform.position, target.transform.position, Time.time * speed);
     transform.rotation = Quaternion.Slerp (transform.rotation, target.transform.rotation, Time.time * speed);
 }

What can I do? Thanks