diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7307c5a..ac54e33 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,27 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.2] - 2026-01-26
+
+### Added
+
+- Per-license customer secrets for API response verification
+- "API Verification Secret" section in customer account licenses page (collapsible)
+- Copy button for customer secrets with clipboard support
+- Documentation for per-license secret derivation and usage
+
+### Security
+
+- Customers no longer need the master server secret for signature verification
+- Each license key has a unique derived secret using HKDF-like key derivation
+- If one customer's secret is compromised, other customers remain unaffected
+
+### Changed
+
+- Updated `ResponseSigner` with static methods for secret derivation
+- Updated `server-implementation.md` with per-license secret documentation
+- Added new translation strings for secret-related UI
+
 ## [0.5.1] - 2026-01-26
 
 ### Fixed
diff --git a/languages/wc-licensed-product.pot b/languages/wc-licensed-product.pot
index 2a17887..f020eb7 100644
--- a/languages/wc-licensed-product.pot
+++ b/languages/wc-licensed-product.pot
@@ -6,9 +6,9 @@
 #, fuzzy
 msgid ""
 msgstr ""
-"Project-Id-Version: WC Licensed Product 0.5.1\n"
+"Project-Id-Version: WC Licensed Product 0.5.2\n"
 "Report-Msgid-Bugs-To: magdev3.0@gmail.com\n"
-"POT-Creation-Date: 2026-01-26 15:26+0100\n"
+"POT-Creation-Date: 2026-01-26 15:29+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
diff --git a/wc-licensed-product.php b/wc-licensed-product.php
index 85a2a64..e820bf2 100644
--- a/wc-licensed-product.php
+++ b/wc-licensed-product.php
@@ -3,7 +3,7 @@
  * Plugin Name: WooCommerce Licensed Product
  * Plugin URI: https://src.bundespruefstelle.ch/magdev/wc-licensed-product
  * Description: WooCommerce plugin to sell software products using license keys with domain-based validation.
- * Version: 0.5.1
+ * Version: 0.5.2
  * Author: Marco Graetsch
  * Author URI: https://src.bundespruefstelle.ch/magdev
  * License: GPL-2.0-or-later
@@ -28,7 +28,7 @@ if (!defined('ABSPATH')) {
 }
 
 // Plugin constants
-define('WC_LICENSED_PRODUCT_VERSION', '0.5.1');
+define('WC_LICENSED_PRODUCT_VERSION', '0.5.2');
 define('WC_LICENSED_PRODUCT_PLUGIN_FILE', __FILE__);
 define('WC_LICENSED_PRODUCT_PLUGIN_DIR', plugin_dir_path(__FILE__));
 define('WC_LICENSED_PRODUCT_PLUGIN_URL', plugin_dir_url(__FILE__));