diff --git a/README.md b/README.md
index a1e8c0faf..3b67ce790 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 This is the officially supported PHP library for using Adyen's APIs.
 
-[![version](https://img.shields.io/badge/version-15.5.0-blue.svg)](https://docs.adyen.com/development-resources/libraries)
+[![version](https://img.shields.io/badge/version-15.5.1-blue.svg)](https://docs.adyen.com/development-resources/libraries)
 
 ## Supported API versions
 The library supports all APIs under the following services:
diff --git a/VERSION b/VERSION
index bc6c86124..ec8a15b48 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-15.5.0
\ No newline at end of file
+15.5.1
\ No newline at end of file
diff --git a/src/Adyen/Client.php b/src/Adyen/Client.php
index 64a88e5a9..ae12f0522 100644
--- a/src/Adyen/Client.php
+++ b/src/Adyen/Client.php
@@ -7,7 +7,7 @@
 
 class Client
 {
-    const LIB_VERSION = "15.5.0";
+    const LIB_VERSION = "15.5.1";
     const LIB_NAME = "adyen-php-api-library";
     const USER_AGENT_SUFFIX = "adyen-php-api-library/";
     const ENDPOINT_TEST = "https://pal-test.adyen.com";