diff --git a/src/PhoneNumber.php b/src/PhoneNumber.php
index 38e9fd8..1e2cf21 100644
--- a/src/PhoneNumber.php
+++ b/src/PhoneNumber.php
@@ -12,13 +12,6 @@
 
 class PhoneNumber
 {
-    /**
-     * The phone number attributes.
-     *
-     * @var array
-     */
-    protected $attributes = [];
-
     /**
      * The libphonenumber instance.
      *