diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1dbaa6d..1313eee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## v4.1.18
+* Fixed constant with version of module.
+
 ## v4.1.17
 * Added additional parameters to GET requests.
 
diff --git a/VERSION b/VERSION
index 73274fd..60623b5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.1.17
+4.1.18
diff --git a/src/upload/admin/controller/extension/module/retailcrm.php b/src/upload/admin/controller/extension/module/retailcrm.php
index 9d5741d..d755a07 100644
--- a/src/upload/admin/controller/extension/module/retailcrm.php
+++ b/src/upload/admin/controller/extension/module/retailcrm.php
@@ -1,9 +1,9 @@
 <?php
 
+use retailcrm\Retailcrm;
+
 class ControllerExtensionModuleRetailcrm extends Controller
 {
-    const VERSION_MODULE = '4.1.17';
-
     private $_error = [];
     protected $log, $statuses, $payments, $deliveryTypes, $retailcrmApiClient, $moduleTitle, $tokenTitle;
     public $children, $template;
@@ -321,7 +321,7 @@ class ControllerExtensionModuleRetailcrm extends Controller
 
         $_data = &$data;
 
-        $_data['module_version'] = self::VERSION_MODULE;
+        $_data['module_version'] = Retailcrm::VERSION_MODULE;
 
         foreach ($text_strings as $text) {
             $_data[$text] = $this->language->get($text);
diff --git a/src/upload/system/library/retailcrm/lib/api/RetailcrmHttpClient.php b/src/upload/system/library/retailcrm/lib/api/RetailcrmHttpClient.php
index 4452fcd..fe97abd 100644
--- a/src/upload/system/library/retailcrm/lib/api/RetailcrmHttpClient.php
+++ b/src/upload/system/library/retailcrm/lib/api/RetailcrmHttpClient.php
@@ -1,5 +1,7 @@
 <?php
 
+use retailcrm\Retailcrm;
+
 class RetailcrmHttpClient
 {
     const METHOD_GET = 'GET';
@@ -66,7 +68,7 @@ class RetailcrmHttpClient
                 'cms_source' => 'OpenCart',
                 'cms_version' => VERSION,
                 'php_version' => function_exists('phpversion') ? phpversion() : '',
-                'module_version' => ControllerExtensionModuleRetailcrm::VERSION_MODULE,
+                'module_version' => Retailcrm::VERSION_MODULE,
             ])
             : $parameters = array_merge($this->defaultParameters, $parameters);
         
diff --git a/src/upload/system/library/retailcrm/retailcrm.php b/src/upload/system/library/retailcrm/retailcrm.php
index 3f21c41..5207368 100644
--- a/src/upload/system/library/retailcrm/retailcrm.php
+++ b/src/upload/system/library/retailcrm/retailcrm.php
@@ -16,6 +16,7 @@ class Retailcrm {
 
     const RETAILCRM_DISCOUNT = 'retailcrm_discount';
     const RETAILCRM_DISCOUNT_SORT_ORDER = 8;
+    const VERSION_MODULE = '4.1.18';
 
     protected $registry;