diff --git a/CHANGELOG.md b/CHANGELOG.md
index 480e566e..df0bc4f7 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [1.2.9.1][1.2.9.1]
+### Add
+*    Deprecation note.
+
 ## [1.2.9.0][1.2.9.0]
 
 ### Add
@@ -453,3 +457,4 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 [1.2.7.2]: https://github.com/heidelpay/heidelpayPHP/compare/1.2.7.1..1.2.7.2
 [1.2.8.0]: https://github.com/heidelpay/heidelpayPHP/compare/1.2.7.2..1.2.8.0
 [1.2.9.0]: https://github.com/heidelpay/heidelpayPHP/compare/1.2.8.0..1.2.9.0
+[1.2.9.1]: https://github.com/heidelpay/heidelpayPHP/compare/1.2.9.0..1.2.9.1
diff --git a/README.md b/README.md
index f317274e..4d6bd19f 100755
--- a/README.md
+++ b/README.md
@@ -7,6 +7,8 @@
 [![PHP 7.4](https://img.shields.io/badge/php-7.4-blue.svg)](http://www.php.net)
 
 ![Logo](https://dev.heidelpay.com/devHeidelpay_400_180.jpg)
+## Deprecated Repository
+**This repository will be replaced by [unzerdev/php-sdk](https://github.com/unzerdev/php-sdk) please refer to the [migration guide](https://docs.unzer.com/docs/migration-to-unzer-php-sdk) to migrate to the new SDK.**
 
 # heidelpay php-sdk
 This SDK provides for an easy way to connect to the heidelpay Rest API.
diff --git a/src/Heidelpay.php b/src/Heidelpay.php
index bde0258d..189bd1c3 100755
--- a/src/Heidelpay.php
+++ b/src/Heidelpay.php
@@ -63,7 +63,7 @@ class Heidelpay implements HeidelpayParentInterface, PaymentServiceInterface, Re
     public const BASE_URL = 'api.heidelpay.com';
     public const API_VERSION = 'v1';
     public const SDK_TYPE = 'heidelpayPHP';
-    public const SDK_VERSION = '1.2.9.0';
+    public const SDK_VERSION = '1.2.9.1';
 
     /** @var string $key */
     private $key;