diff --git a/changelog.txt b/changelog.txt
index f74c6d6..e09ded6 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,5 +1,8 @@
 == Groups by itthinx - changelog.txt
 
+2024-12-29 - version 3.4.1
+* Update - Declare WooCommerce HPOS compatibility.
+
 2024-12-26 - version 3.4.0
 * Update - WordPress 6.7 compatible.
 * Dev - Security validation WordPress.DB.PreparedSQL.InterpolatedNotPrepared
diff --git a/groups.php b/groups.php
index 3cd73fd..dfb049f 100644
--- a/groups.php
+++ b/groups.php
@@ -21,7 +21,7 @@
  * Plugin Name: Groups
  * Plugin URI: https://www.itthinx.com/plugins/groups
  * Description: Groups provides group-based user membership management, group-based capabilities and content access control.
- * Version: 3.4.0
+ * Version: 3.4.1
  * Requires at least: 6.0
  * Requires PHP: 7.4
  * WC requires at least: 8.2
@@ -36,7 +36,7 @@
 if ( !defined( 'ABSPATH' ) ) {
 	exit;
 }
-define( 'GROUPS_CORE_VERSION', '3.4.0' );
+define( 'GROUPS_CORE_VERSION', '3.4.1' );
 define( 'GROUPS_FILE', __FILE__ );
 if ( !defined( 'GROUPS_CORE_DIR' ) ) {
 	define( 'GROUPS_CORE_DIR', untrailingslashit( plugin_dir_path( __FILE__ ) ) );
diff --git a/lib/extra/class-groups-extra.php b/lib/extra/class-groups-extra.php
index 2fb3276..6dda325 100644
--- a/lib/extra/class-groups-extra.php
+++ b/lib/extra/class-groups-extra.php
@@ -28,6 +28,14 @@
  */
 class Groups_Extra {
 
+	/**
+	 * Early actions.
+	 */
+	public static function boot() {
+		add_action( 'init', array( __CLASS__, 'init' ) );
+		add_action( 'before_woocommerce_init', array( __CLASS__, 'before_woocommerce_init' ) );
+	}
+
 	/**
 	 * Registers actions, filters ...
 	 */
@@ -47,6 +55,7 @@ public static function init() {
 	 *
 	 * @param boolean $visible
 	 * @param int $product_id
+	 *
 	 * @return boolean
 	 */
 	public static function woocommerce_product_is_visible( $visible, $product_id ) {
@@ -61,6 +70,7 @@ public static function woocommerce_product_is_visible( $visible, $product_id ) {
 	 *
 	 * @param string $where
 	 * @param int $post_id
+	 *
 	 * @return string
 	 */
 	public static function groups_comment_access_comment_count_where( $where, $post_id ) {
@@ -92,5 +102,17 @@ public static function groups_post_access_posts_where_query_get_post_types( $pos
 		}
 		return $post_types;
 	}
+
+	/**
+	 * Declare WooCommerce feature compatibility.
+	 *
+	 * @since 3.4.1
+	 */
+	public static function before_woocommerce_init() {
+		// HPOS
+		if ( class_exists( \Automattic\WooCommerce\Utilities\FeaturesUtil::class ) ) {
+			\Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility( 'custom_order_tables', GROUPS_FILE, true );
+		}
+	}
 }
-add_action( 'init', array( 'Groups_Extra', 'init' ) );
+Groups_Extra::boot();
diff --git a/readme.txt b/readme.txt
index fa0dba9..9872766 100644
--- a/readme.txt
+++ b/readme.txt
@@ -5,7 +5,7 @@ Tags: groups, access, access control, member, membership
 Requires at least: 6.0
 Tested up to: 6.7
 Requires PHP: 7.4
-Stable tag: 3.4.0
+Stable tag: 3.4.1
 License: GPLv3
 
 Groups is an efficient and powerful solution, providing group-based user membership management, group-based capabilities and content access control.