diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a71bd4..55ae60f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 2.4.2
+* Minor fixes
+
 ## 2.4.1
 * Fixing #141 - missing DateTime in allowed_classes when unserializing
 
diff --git a/composer.json b/composer.json
index 790bbd6..e3e10e9 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
   "type": "library",
   "license": "apache-2.0",
   "description": "OpenPayU PHP Library",
-  "version": "2.4.1",
+  "version": "2.4.2",
   "extra": [
     {
       "engine": "PHP SDK"
diff --git a/lib/OpenPayU/Configuration.php b/lib/OpenPayU/Configuration.php
index 43ad73f..811d666 100644
--- a/lib/OpenPayU/Configuration.php
+++ b/lib/OpenPayU/Configuration.php
@@ -85,7 +85,7 @@ class OpenPayU_Configuration
 
     const API_VERSION = '2.1';
     const COMPOSER_JSON = "/composer.json";
-    const DEFAULT_SDK_VERSION = 'PHP SDK 2.4.1';
+    const DEFAULT_SDK_VERSION = 'PHP SDK 2.4.2';
     const OAUTH_CONTEXT = 'pl/standard/user/oauth/authorize';
 
     /**
diff --git a/tests/unit/OpenPayU_ConfigurationTest.php b/tests/unit/OpenPayU_ConfigurationTest.php
index b15728b..bb5db99 100644
--- a/tests/unit/OpenPayU_ConfigurationTest.php
+++ b/tests/unit/OpenPayU_ConfigurationTest.php
@@ -14,7 +14,7 @@
 class OpenPayU_ConfigurationTest extends TestCase
 {
 
-    const PHP_SDK_VERSION = 'PHP SDK 2.4.1';
+    const PHP_SDK_VERSION = 'PHP SDK 2.4.2';
     const API_VERSION = '2.1';
     const POS_ID = 'PosId';
     const SIGNATURE_KEY = 'SignatureKey';