diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef6a28c..ab8423e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,28 @@ All notable changes to WooCommerce Tier and Package Prices will be documented in
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.1.18] - 2025-12-22
+
+### Fixed
+
+- **ROOT CAUSE IDENTIFIED**: Settings page rendering twice due to automatic instantiation in settings file
+- Settings file being included multiple times via Composer autoloader creating duplicate instances
+
+### Changed
+
+- Removed `return new WC_TPP_Settings();` from bottom of settings file
+- Changed admin class to explicitly instantiate settings with `new WC_TPP_Settings()`
+- Changed from `include` to `require_once` for settings file to prevent multiple loads
+
+### Technical Details
+
+- Settings file (class-wc-tpp-settings.php) was creating instance automatically on include
+- File is in Composer's classmap, so when autoloaded it executed instantiation again
+- Each include/autoload created new instance even with singleton pattern in admin class
+- Solution: Remove automatic instantiation, use `require_once` + explicit `new` in admin class
+- Now settings instance only created once, explicitly, when needed by filter
+- Composer autoload can load class definition without side effects
+
 ## [1.1.17] - 2025-12-22
 
 ### Fixed
diff --git a/composer.json b/composer.json
index cefa5e6..d8c9991 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "name": "magdev/wc-tier-package-prices",
     "description": "WooCommerce plugin for tier pricing and package prices with Twig templates",
-    "version": "1.1.17",
+    "version": "1.1.18",
     "type": "wordpress-plugin",
     "license": "GPL-2.0-or-later",
     "authors": [
diff --git a/includes/class-wc-tpp-admin.php b/includes/class-wc-tpp-admin.php
index 96b9241..cded785 100644
--- a/includes/class-wc-tpp-admin.php
+++ b/includes/class-wc-tpp-admin.php
@@ -30,7 +30,8 @@ if (!class_exists('WC_TPP_Admin')) {
      */
     public function add_settings_page($settings) {
         if (null === self::$settings_instance) {
-            self::$settings_instance = include WC_TPP_PLUGIN_DIR . 'includes/class-wc-tpp-settings.php';
+            require_once WC_TPP_PLUGIN_DIR . 'includes/class-wc-tpp-settings.php';
+            self::$settings_instance = new WC_TPP_Settings();
         }
 
         // Check if our settings page is already in the array to prevent duplicates
diff --git a/includes/class-wc-tpp-settings.php b/includes/class-wc-tpp-settings.php
index a370e83..5cfdd12 100644
--- a/includes/class-wc-tpp-settings.php
+++ b/includes/class-wc-tpp-settings.php
@@ -141,5 +141,3 @@ if (!class_exists('WC_TPP_Settings')) {
     }
 }
 }
-
-return new WC_TPP_Settings();
diff --git a/wc-tier-and-package-prices.php b/wc-tier-and-package-prices.php
index 7c808a0..ae7b7ff 100644
--- a/wc-tier-and-package-prices.php
+++ b/wc-tier-and-package-prices.php
@@ -4,7 +4,7 @@
  * Plugin Name: WooCommerce Tier and Package Prices
  * Plugin URI: https://src.bundespruefstelle.ch/magdev/wc-tier-package-prices
  * Description: Add tier pricing and package prices to WooCommerce products with configurable quantities at fixed prices
- * Version: 1.1.17
+ * Version: 1.1.18
  * Author: Marco Graetsch
  * Author URI: https://src.bundespruefstelle.ch/magdev
  * Text Domain: wc-tier-package-prices
@@ -23,7 +23,7 @@ if (!defined('ABSPATH')) {
 
 // Define plugin constants
 if (!defined('WC_TPP_VERSION')) {
-    define('WC_TPP_VERSION', '1.1.17');
+    define('WC_TPP_VERSION', '1.1.18');
 }
 if (!defined('WC_TPP_PLUGIN_DIR')) {
     define('WC_TPP_PLUGIN_DIR', plugin_dir_path(__FILE__));