diff --git a/lib/RetailCrm/ApiClient.php b/lib/RetailCrm/ApiClient.php
index 03b7590..2c1defe 100644
--- a/lib/RetailCrm/ApiClient.php
+++ b/lib/RetailCrm/ApiClient.php
@@ -9,7 +9,7 @@
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 
 namespace RetailCrm;
@@ -26,7 +26,7 @@ use RetailCrm\Response\ApiResponse;
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 class ApiClient
 {
diff --git a/lib/RetailCrm/Exception/CurlException.php b/lib/RetailCrm/Exception/CurlException.php
index 827db72..a2cd668 100644
--- a/lib/RetailCrm/Exception/CurlException.php
+++ b/lib/RetailCrm/Exception/CurlException.php
@@ -9,7 +9,7 @@
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 
 namespace RetailCrm\Exception;
@@ -23,7 +23,7 @@ namespace RetailCrm\Exception;
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 class CurlException extends \RuntimeException
 {
diff --git a/lib/RetailCrm/Exception/InvalidJsonException.php b/lib/RetailCrm/Exception/InvalidJsonException.php
index 166304d..e4b8dd7 100644
--- a/lib/RetailCrm/Exception/InvalidJsonException.php
+++ b/lib/RetailCrm/Exception/InvalidJsonException.php
@@ -9,7 +9,7 @@
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 
 namespace RetailCrm\Exception;
@@ -23,7 +23,7 @@ namespace RetailCrm\Exception;
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 class InvalidJsonException extends \DomainException
 {
diff --git a/lib/RetailCrm/Http/Client.php b/lib/RetailCrm/Http/Client.php
index 4e16190..be4c169 100644
--- a/lib/RetailCrm/Http/Client.php
+++ b/lib/RetailCrm/Http/Client.php
@@ -9,7 +9,7 @@
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 
 namespace RetailCrm\Http;
@@ -27,7 +27,7 @@ use RetailCrm\Response\ApiResponse;
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 class Client
 {
diff --git a/lib/RetailCrm/Response/ApiResponse.php b/lib/RetailCrm/Response/ApiResponse.php
index 70c145a..6959f2c 100644
--- a/lib/RetailCrm/Response/ApiResponse.php
+++ b/lib/RetailCrm/Response/ApiResponse.php
@@ -9,7 +9,7 @@
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 
 namespace RetailCrm\Response;
@@ -25,7 +25,7 @@ use RetailCrm\Exception\InvalidJsonException;
  * @package  RetailCrm
  * @author   RetailCrm <integration@retailcrm.ru>
  * @license  https://opensource.org/licenses/MIT MIT License
- * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion3
+ * @link     http://www.retailcrm.ru/docs/Developers/ApiVersion4
  */
 class ApiResponse implements \ArrayAccess
 {