diff --git a/README.md b/README.md
index 98a09b4..1cc5eb3 100644
--- a/README.md
+++ b/README.md
@@ -585,7 +585,7 @@ If you want to retrieve the cart from the database and restore it, all you have
 If you want to merge the cart with another one from the database, all you have to do is call the  `merge($identifier)` where `$identifier` is the key you specified for the `store` method. You can also define if you want to keep the discount and tax rates of the items and if you want to dispatch "cart.added" events.
      
     // Merge the contents of 'savedcart' into 'username'.
-    Cart::instance('username')->merge('savedcart', $keepDiscount, $keepTaxrate, $dispatchAdd);
+    Cart::instance('username')->merge('savedcart', $keepDiscount, $keepTaxrate, $dispatchAdd, 'savedcartinstance');
 
 ### Erasing the cart
 If you want to erase the cart from the database, all you have to do is call the  `erase($identifier)` where `$identifier` is the key you specified for the `store` method.
diff --git a/README_Idn.md b/README_Idn.md
index 5861093..a9999a1 100644
--- a/README_Idn.md
+++ b/README_Idn.md
@@ -544,7 +544,7 @@ Jika Anda ingin mengambil keranjang dari database dan mengembalikannya, yang har
 Jika Anda ingin menggabungkan keranjang dengan keranjang lain dari basis data, yang harus Anda lakukan adalah memanggil `gabungan ($ identifier)` di mana `$ identifier` adalah kunci yang Anda tentukan untuk metode` store`. Anda juga dapat menentukan apakah Anda ingin mempertahankan potongan harga dan tarif pajak item.
      
     // Merge the contents of 'savedcart' into 'username'.
-    Cart::instance('username')->merge('savedcart', $keepDiscount, $keepTaxrate);
+    Cart::instance('username')->merge('savedcart', $keepDiscount, $keepTaxrate, 'savedcartinstance');
 
 ## Pengecualian
 
diff --git a/README_uk-UA.md b/README_uk-UA.md
index fb27de2..9b2ed83 100644
--- a/README_uk-UA.md
+++ b/README_uk-UA.md
@@ -542,7 +542,7 @@ foreach(Cart::content() as $row) {
 Якщо ви хочете злити кошик із іншим кошиком, збереженим у базі даних, вам знадобиться викликати метод `merge($identifier)`, де `$identifier` - це ключ, який ви зазначили у методі`store`. Ви також можете визначити чи хочете ви зберегти знижку і ставку оподаткування для товарів.
      
     // Merge the contents of 'savedcart' into 'username'.
-    Cart::instance('username')->merge('savedcart', $keepDiscount, $keepTaxrate);
+    Cart::instance('username')->merge('savedcart', $keepDiscount, $keepTaxrate, 'savedcartinstance');
 
 ## Перехоплення