diff --git a/payrexx/config.xml b/payrexx/config.xml
index 08ee27d..fe21013 100644
--- a/payrexx/config.xml
+++ b/payrexx/config.xml
@@ -2,7 +2,7 @@
 <module>
     <name>payrexx</name>
     <displayName><![CDATA[Payrexx]]></displayName>
-    <version><![CDATA[1.5.1]]></version>
+    <version><![CDATA[1.5.2]]></version>
     <description><![CDATA[Accept payments using Payrexx Payment gateway]]></description>
     <author><![CDATA[Payrexx]]></author>
     <tab><![CDATA[payments_gateways]]></tab>
diff --git a/payrexx/controllers/front/gateway.php b/payrexx/controllers/front/gateway.php
index 4b5b6c7..f068d77 100644
--- a/payrexx/controllers/front/gateway.php
+++ b/payrexx/controllers/front/gateway.php
@@ -5,7 +5,7 @@
  * needs please refer to http://www.prestashop.com for more information.
  *
  * @author    Payrexx <integration@payrexx.com>
- * @copyright 2023 Payrexx
+ * @copyright 2024 Payrexx
  * @license   MIT License
  */
 if (!defined('_PS_VERSION_')) {
@@ -19,7 +19,24 @@
 
 class PayrexxGatewayModuleFrontController extends ModuleFrontController
 {
-    public function initContent()
+    /**
+     * Process post values.
+     */
+    public function postProcess()
+    {
+        try {
+            $this->processWebhook();
+            echo 'Webhook processed successfully';
+        } catch (Exception $e) {
+            echo 'Webhook Error: ' . $e->getMessage();
+        }
+        exit; // Avoid template load error.
+    }
+
+    /**
+     * Process webhook values
+     */
+    private function processWebhook()
     {
         if (version_compare(_PS_VERSION_, '1.7.6', '<')) {
             $payrexxOrderService = new PayrexxOrderService();
@@ -35,11 +52,11 @@ public function initContent()
         $order = Order::getByCartId($cartId);
 
         if (!$this->validRequest($transaction, $cartId, $requestStatus)) {
-            exit;
+            return;
         }
 
         if (!$prestaStatus = $payrexxOrderService->getPrestaStatusByPayrexxStatus($requestStatus)) {
-            exit;
+            return;
         }
 
         $pm = $payrexxDbService->getPaymentMethodByCartId($cartId);
@@ -56,18 +73,17 @@ public function initContent()
                     'transaction_id' => $transaction['id'],
                 ]
             );
-            exit;
+            return;
         }
 
         if ($order->module !== $this->module->name) {
-            exit;
+            return;
         }
 
         // Update status if transition allowed
         if ($order && $payrexxOrderService->transitionAllowed($prestaStatus, $order->current_state)) {
             $payrexxOrderService->updateOrderStatus($prestaStatus, $order);
         }
-        exit;
     }
 
     private function validRequest($transaction, $cartId, $requestStatus): bool
diff --git a/payrexx/payrexx.php b/payrexx/payrexx.php
index 32bbd49..d975d09 100644
--- a/payrexx/payrexx.php
+++ b/payrexx/payrexx.php
@@ -31,7 +31,7 @@ public function __construct()
         $this->name = 'payrexx';
         $this->tab = 'payments_gateways';
         $this->module_key = '0c4dbfccbd85dd948fd9a13d5a4add90';
-        $this->version = '1.5.1';
+        $this->version = '1.5.2';
         $this->author = 'Payrexx';
         $this->is_eu_compatible = 1;
         $this->ps_versions_compliancy = ['min' => '1.7'];
diff --git a/payrexx/src/Service/PayrexxOrderService.php b/payrexx/src/Service/PayrexxOrderService.php
index 6dab6ca..8c983c6 100644
--- a/payrexx/src/Service/PayrexxOrderService.php
+++ b/payrexx/src/Service/PayrexxOrderService.php
@@ -27,6 +27,12 @@ class PayrexxOrderService
     // ID 10
     const PS_STATUS_BANKWIRE = 'PS_OS_BANKWIRE';
 
+    // ID 4
+    const PS_STATUS_SHIPPING = 'PS_OS_SHIPPING';
+
+    // ID 5
+    const PS_STATUS_DELIVERED = 'PS_OS_DELIVERED';
+
     /**
      * @param $cartId
      * @param $prestaStatus
@@ -98,16 +104,33 @@ public function getPrestaStatusByPayrexxStatus($transactionStatus)
      */
     public function transitionAllowed($newStatus, $oldStatusId)
     {
+        $refundStatusId = (int) \Configuration::get(self::PS_STATUS_REFUND);
+        $newStatusId = (int) \Configuration::get($newStatus);
+        if ($oldStatusId === $newStatusId && $newStatusId !== $refundStatusId) {
+            return false;
+        }
+        $orderFinalStatuses = [
+            (int) \Configuration::get(self::PS_STATUS_REFUND),
+            (int) \Configuration::get(self::PS_STATUS_PAYMENT),
+            (int) \Configuration::get(self::PS_STATUS_SHIPPING),
+            (int) \Configuration::get(self::PS_STATUS_DELIVERED),
+        ];
+
         switch ($newStatus) {
             case self::PS_STATUS_ERROR:
-                return !in_array($oldStatusId, [(int) \Configuration::get(self::PS_STATUS_PAYMENT), (int) \Configuration::get(self::PS_STATUS_REFUND)]);
-            case self::PS_STATUS_REFUND:
-                return in_array($oldStatusId, [(int) \Configuration::get(self::PS_STATUS_PAYMENT), (int) \Configuration::get(self::PS_STATUS_REFUND)]);
             case self::PS_STATUS_PAYMENT:
-                return $oldStatusId !== (int) \Configuration::get(self::PS_STATUS_PAYMENT);
             case self::PS_STATUS_BANKWIRE:
-                return $oldStatusId !== (int) \Configuration::get(self::PS_STATUS_BANKWIRE);
+                return !in_array($oldStatusId, $orderFinalStatuses);
+            case self::PS_STATUS_REFUND:
+                return in_array(
+                    $oldStatusId,
+                    [
+                        (int) \Configuration::get(self::PS_STATUS_PAYMENT),
+                        (int) \Configuration::get(self::PS_STATUS_REFUND),
+                    ]
+                );
         }
+        return false;
     }
 
     /**