diff --git a/.version b/.version
index f225a78..aedc15b 100644
--- a/.version
+++ b/.version
@@ -1 +1 @@
-2.5.2
+2.5.3
diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index 7e45c77..a6d3a84 100644
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 2.5.3
+
+### Added
+
+- Validation for notification request
+
 ## 2.5.2
 
 ### Fixed
diff --git a/Notification/NotificationProcessor.php b/Notification/NotificationProcessor.php
index 950008f..42a2ba4 100644
--- a/Notification/NotificationProcessor.php
+++ b/Notification/NotificationProcessor.php
@@ -28,17 +28,29 @@ public function __construct(NotificationProcessorFactoryInterface $factory, Tpay
     public function process()
     {
         $strategy = $this->factory->create($this->request->getPost()->toArray());
+        $storeId = null;
 
-        if ($strategy instanceof BlikAliasNotificationProcessor) {
-            $storeId = null;
-        } else {
-            $orderId = $this->request->getPost('order_id') ? base64_decode($this->request->getPost('order_id')) : base64_decode($this->request->getPost('tr_crc'));
-            $storeId = $this->getOrderStore($orderId);
+        if (!$strategy instanceof BlikAliasNotificationProcessor) {
+            $orderId = $this->getOrderId();
+            if ($orderId) {
+                $storeId = $this->getOrderStore($orderId);
+            }
         }
 
         $strategy->process($storeId);
     }
 
+    private function getOrderId(): ?string
+    {
+        $value = $this->request->getPost('order_id') ?? $this->request->getPost('tr_crc');
+
+        if (null === $value) {
+            return null;
+        }
+
+        return base64_decode($value);
+    }
+
     private function getOrderStore(string $orderId): ?int
     {
         $order = $this->tpayService->getOrderById($orderId);
diff --git a/composer.json b/composer.json
index 821831e..b83b5a4 100755
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "composer-runtime-api": "^2.0",
         "magento/framework": "^103.0",
         "magento/module-csp": "^100.4.5-p6",
-        "tpay-com/tpay-openapi-php": "^2.2.1",
+        "tpay-com/tpay-openapi-php": "^2.2.3",
         "tpay-com/tpay-php": "^2.4.7"
     },
     "suggest": {