diff --git a/src/Cart.php b/src/Cart.php
index 369bb2ec..941fabbb 100644
--- a/src/Cart.php
+++ b/src/Cart.php
@@ -13,9 +13,12 @@
 use Illuminate\Database\DatabaseManager;
 use Illuminate\Session\SessionManager;
 use Illuminate\Support\Collection;
+use Illuminate\Support\Traits\Macroable;
 
 class Cart
 {
+    use Macroable;
+
     const DEFAULT_INSTANCE = 'default';
 
     /**