diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6af5d6..b679e8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [#.#.#] - YYYY-MM-DD
+## [4.1.0] - 2026-01-29
 
 ### Added
 
diff --git a/README.md b/README.md
index ca5d048..fa855d7 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 
 # [PerimeterX](http://www.perimeterx.com) PHP SDK
 
-> Latest stable version: [v4.0.1](https://packagist.org/packages/perimeterx/php-sdk#4.0.1)
+> Latest stable version: [v4.1.0](https://packagist.org/packages/perimeterx/php-sdk#4.1.0)
 
 ## Table of Contents
 
diff --git a/composer.json b/composer.json
index 5005a4e..ea90f6b 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
   "name": "perimeterx/php-sdk",
   "description": "PerimeterX SDK for PHP",
-  "version" : "4.0.1",
+  "version" : "4.1.0",
   "keywords": [
     "perimeterx",
     "websecurity",
diff --git a/px_metadata.json b/px_metadata.json
index 2bc13e9..3019da4 100644
--- a/px_metadata.json
+++ b/px_metadata.json
@@ -1,5 +1,5 @@
 {
-    "version": "4.0.1",
+    "version": "4.1.0",
     "supported_features": [
         "additional_activity_handler",
         "advanced_blocking_response",
diff --git a/src/Perimeterx.php b/src/Perimeterx.php
index f88a627..e74c899 100644
--- a/src/Perimeterx.php
+++ b/src/Perimeterx.php
@@ -99,7 +99,7 @@ private function __construct(array $pxConfig = [])
                 'max_buffer_len' => 1,
                 'send_page_activities' => true,
                 'send_block_activities' => true,
-                'sdk_name' => 'PHP SDK v4.0.1',
+                'sdk_name' => 'PHP SDK v4.1.0',
                 'debug_mode' => false,
                 'perimeterx_server_host' => 'https://sapi-' . strtolower($pxConfig['app_id']) . '.perimeterx.net',
                 'captcha_script_host' => 'https://captcha.px-cdn.net',