diff --git a/CHANGELOG.md b/CHANGELOG.md
index 515389dd..7edf1ece 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 2025-01-29 v6.6.6
+- Поддержка нулевой закупочной стоимости при генерации каталога
+
 ## 2025-01-28 v6.6.5
 - Исправлена ошибка редактирования интеграционных доставок при активации опции передачи статусов интеграционных оплат
 
diff --git a/intaro.retailcrm/description.ru b/intaro.retailcrm/description.ru
index c3270fdb..db7b8c30 100644
--- a/intaro.retailcrm/description.ru
+++ b/intaro.retailcrm/description.ru
@@ -1 +1 @@
-- Исправлена ошибка редактирования интеграционных доставок при активации опции передачи статусов интеграционных оплат
+- Поддержка нулевой закупочной стоимости при генерации каталога
diff --git a/intaro.retailcrm/install/version.php b/intaro.retailcrm/install/version.php
index 94cd4d62..191fd74c 100644
--- a/intaro.retailcrm/install/version.php
+++ b/intaro.retailcrm/install/version.php
@@ -1,6 +1,6 @@
 <?php
 
 $arModuleVersion = [
-    'VERSION'      => '6.6.5',
-    'VERSION_DATE' => '2025-01-28 18:00:00'
+    'VERSION'      => '6.6.6',
+    'VERSION_DATE' => '2025-01-29 18:00:00'
 ];
diff --git a/intaro.retailcrm/lib/component/constants.php b/intaro.retailcrm/lib/component/constants.php
index 5908ca5b..a3008f95 100644
--- a/intaro.retailcrm/lib/component/constants.php
+++ b/intaro.retailcrm/lib/component/constants.php
@@ -18,7 +18,7 @@ namespace Intaro\RetailCrm\Component;
  */
 class Constants
 {
-    public const MODULE_VERSION = '6.6.5';
+    public const MODULE_VERSION = '6.6.6';
     public const CRM_PURCHASE_PRICE_NULL = 'purchasePrice_null';
     public const BITRIX_USER_ID_PREFIX = 'bitrixUserId-';
     public const CRM_USERS_MAP = 'crm_users_map';
diff --git a/intaro.retailcrm/lib/icml/icmlwriter.php b/intaro.retailcrm/lib/icml/icmlwriter.php
index 07e72eac..165d9d63 100644
--- a/intaro.retailcrm/lib/icml/icmlwriter.php
+++ b/intaro.retailcrm/lib/icml/icmlwriter.php
@@ -163,7 +163,7 @@ class IcmlWriter
         $this->writeOptionalSimpleElement('vatRate', $offer->vatRate);
         $this->writeOptionalSimpleElement('weight', $offer->weight);
         $this->writeOptionalSimpleElement('dimensions', $offer->dimensions);
-        $this->writeOptionalSimpleElement('purchasePrice', $offer->purchasePrice);
+        $this->writeOptionalSimpleElement('purchasePrice', $offer->purchasePrice, true);
         $this->writer->endElement();
     }
 
@@ -173,10 +173,12 @@ class IcmlWriter
      * @param string $name
      * @param        $value
      */
-    private function writeOptionalSimpleElement(string $name, $value): void
+    private function writeOptionalSimpleElement(string $name, $value, bool $isEmptyAllowed = false): void
     {
         if (!empty($value)) {
             $this->writeSimpleElement($name, $value);
+        } elseif ($isEmptyAllowed) {
+            $this->writeSimpleElement($name, $value);
         }
     }