diff --git a/src/CartItem.php b/src/CartItem.php
index abc69d0..d189a39 100644
--- a/src/CartItem.php
+++ b/src/CartItem.php
@@ -380,7 +380,7 @@ class CartItem implements Arrayable, Jsonable
     }
 
     /**
-     * Set cart instance
+     * Set cart instance.
      *
      * @param string $instance
      *