diff --git a/README.md b/README.md
index 3709320..07541b2 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,9 @@
 
 <br />
 
-PHP (5.6+) SDK for integration internet-acquiring of the Uniteller. [The documentation is available in Russian language](README_RU.md). 
+PHP (5.6+) SDK for integration internet-acquiring of the Uniteller (unofficial).
+[The documentation is available in Russian language](README_RU.md).
+Also, this SDK integrated with [Payum](https://github.com/Payum/Payum) library and you can use [gateway](https://github.com/tmconsulting/payum-uniteller-gateway).
 
 Features:
 * payment (method `pay`)
diff --git a/README_RU.md b/README_RU.md
index b413ce9..75fd172 100644
--- a/README_RU.md
+++ b/README_RU.md
@@ -26,7 +26,8 @@
 
 <br />
 
-PHP (5.6+) SDK для интеграции с интернет-эквайрингом от Uniteller.
+PHP (5.6+) SDK для интеграции с интернет-эквайрингом от Uniteller (не официальная).
+Также, SDK интегрирован с библиотекой [Payum](https://github.com/Payum/Payum) и вы можете использовать этот [шлюз]((https://github.com/tmconsulting/payum-uniteller-gateway)) для работы.
 
 Реализовано:
 * оплата (метод `pay`)