C# Raycast isn't working?

For some reason my raycast isn't working. I was wondering if someone could help me. Here is my code:

 void Update () {
         if (Input.GetMouseButtonDown(0))
         {
             
             RaycastHit hit;
             Vector3 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
             Ray ray = Camera.main.ScreenPointToRay(mousePos);
             if (Physics.Raycast(ray, out hit, Mathf.Infinity, 0)) {
                 Debug.Log("Works");
                 
             }
         }
 }

For some reason it isn't logging the message.