Necesito que mi personaje salte cada vez que le doy a la tecla espacio sin errores

void Start()
{
    player = GetComponent<CharacterController>();
    animator = GetComponent<Animator>();
    player.transform.position = new Vector3(0, 0, 0);
}

void Update()
{
    float horizontal = Input.GetAxis("Horizontal");
    float vertical = Input.GetAxis("Vertical");
    Vector3 movement = new Vector3(horizontal, 0, vertical);
    player.Move(movement * Time.deltaTime * speed);
    if (movement != Vector3.zero)
    {
        transform.forward = movement;
        animator.SetBool("walk", true);
    }
    else
    {
        animator.SetBool("walk", false);
    }
    if (Input.GetKeyDown(KeyCode.Space))
    {
        animator.SetBool("jump", true);
    }
    else
    {
        animator.SetBool("jump", false);
    }
}