Sprite image not changing

Player's sprite is not changing on GetKeyDown script:

 void ChangeDefaultSprite()
     {
         spriteRenderer.sprite = defaultSprite;
         isCrossbow = false;
         isAxe = false;
         anim.SetBool("isAxe", false);
     }
 
     void CrossbowSprite()
     {
         spriteRenderer.sprite = crossbowSprite;
         isCrossbow = true;
         isAxe = false;
         anim.SetBool("isAxe", false);
     }
 
     void AxeSprite()
     {
         spriteRenderer.sprite = axeSprite;
         isAxe = true;
         isCrossbow = false;
         anim.SetBool("isAxe", true);
     }
 void Update()
     {
         movement.x = Input.GetAxisRaw("Horizontal");
         movement.y = Input.GetAxisRaw("Vertical");
 
         mousePos = cam.ScreenToWorldPoint(Input.mousePosition);
 
         if(Input.GetKeyDown(KeyCode.Alpha1))
         {
             ChangeDefaultSprite();
         }
 
         if(Input.GetKeyDown(KeyCode.Alpha2))
         {
             CrossbowSprite();
         }
 
         if(Input.GetKeyDown(KeyCode.Alpha3))
         {
             AxeSprite();
         }
 
         if(rb.velocity != Vector2.zero)
         {
             anim.SetBool("isWalking", true);
         }
         else
         {
             anim.SetBool("isWalking", false);
         }
     }

I see that isCrossbow bool changes to true but image sprite not. Anyone knows what is the problem?