diff --git a/src/Entities/AgentInfo.php b/src/Entities/AgentInfo.php
index 6b4ddec..4607734 100644
--- a/src/Entities/AgentInfo.php
+++ b/src/Entities/AgentInfo.php
@@ -19,7 +19,7 @@ use AtolOnline\Exceptions\InvalidEnumValueException;
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 26-28
  */
-class AgentInfo extends Entity
+final class AgentInfo extends Entity
 {
     /**
      * @var string|null Признак агента (1057)
diff --git a/src/Entities/Client.php b/src/Entities/Client.php
index 4e54f37..983233b 100644
--- a/src/Entities/Client.php
+++ b/src/Entities/Client.php
@@ -30,7 +30,7 @@ use JetBrains\PhpStorm\Pure;
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 17
  */
-class Client extends Entity
+final class Client extends Entity
 {
     use HasEmail, HasInn;
 
diff --git a/src/Entities/Company.php b/src/Entities/Company.php
index aeb556e..9ce6bfe 100644
--- a/src/Entities/Company.php
+++ b/src/Entities/Company.php
@@ -32,7 +32,7 @@ use JetBrains\PhpStorm\ArrayShape;
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 17
  */
-class Company extends Entity
+final class Company extends Entity
 {
     use HasEmail, HasInn;
 
diff --git a/src/Entities/Item.php b/src/Entities/Item.php
index 010ce62..0372fc3 100644
--- a/src/Entities/Item.php
+++ b/src/Entities/Item.php
@@ -40,7 +40,7 @@ use AtolOnline\Exceptions\{
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 21-30
  */
-class Item extends Entity
+final class Item extends Entity
 {
     /**
      * @var string Наименование (1030)
diff --git a/src/Entities/MoneyTransferOperator.php b/src/Entities/MoneyTransferOperator.php
index 0047065..1ccdb1e 100644
--- a/src/Entities/MoneyTransferOperator.php
+++ b/src/Entities/MoneyTransferOperator.php
@@ -26,7 +26,7 @@ use Illuminate\Support\Collection;
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 28
  */
-class MoneyTransferOperator extends Entity
+final class MoneyTransferOperator extends Entity
 {
     use HasInn, HasPhones;
 
diff --git a/src/Entities/PayingAgent.php b/src/Entities/PayingAgent.php
index a44aba7..4b6c028 100644
--- a/src/Entities/PayingAgent.php
+++ b/src/Entities/PayingAgent.php
@@ -24,7 +24,7 @@ use Illuminate\Support\Collection;
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 19
  */
-class PayingAgent extends Entity
+final class PayingAgent extends Entity
 {
     use HasPhones;
 
diff --git a/src/Entities/ReceivePaymentsOperator.php b/src/Entities/ReceivePaymentsOperator.php
index 1bc5107..83b52a3 100644
--- a/src/Entities/ReceivePaymentsOperator.php
+++ b/src/Entities/ReceivePaymentsOperator.php
@@ -20,7 +20,7 @@ use Illuminate\Support\Collection;
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 19-20
  */
-class ReceivePaymentsOperator extends Entity
+final class ReceivePaymentsOperator extends Entity
 {
     use HasPhones;
 
diff --git a/src/Entities/Supplier.php b/src/Entities/Supplier.php
index 81d8c28..579e241 100644
--- a/src/Entities/Supplier.php
+++ b/src/Entities/Supplier.php
@@ -26,7 +26,7 @@ use Illuminate\Support\Collection;
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 29
  */
-class Supplier extends Entity
+final class Supplier extends Entity
 {
     use HasPhones, HasInn;
 
diff --git a/src/Entities/Vat.php b/src/Entities/Vat.php
index f158a37..69f737c 100644
--- a/src/Entities/Vat.php
+++ b/src/Entities/Vat.php
@@ -24,7 +24,7 @@ use JetBrains\PhpStorm\{
  *
  * @see https://online.atol.ru/files/API_atol_online_v4.pdf Документация, стр 25, 31
  */
-class Vat extends Entity
+final class Vat extends Entity
 {
     /**
      * @var string Тип ставки НДС (1199, 1105, 1104, 1103, 1102, 1107, 1106)