diff --git a/changelog.txt b/changelog.txt
index 98aba58..29bab1f 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,5 +1,9 @@
 *** WooCommerce.com Update Manager Changelog ***
 
+2024-06-10 - version 1.0.3
+* Update - Declare compatibility with WooCommerce cart_checkout_blocks feature.
+* Fix - Fix function name conflicts with other plugins.
+
 2024-04-12 - version 1.0.2
 * Update - Plugin name from Woo.com Update Manager to WooCommerce.com Update Manager.
 
diff --git a/includes/class-woo-subscription-data-updater.php b/includes/class-woo-subscription-data-updater.php
index 4c5ce16..af4ab8d 100644
--- a/includes/class-woo-subscription-data-updater.php
+++ b/includes/class-woo-subscription-data-updater.php
@@ -2,9 +2,11 @@
 /**
  * Updates the plugin details stored in transients used for auto-updates.
  *
- * @package Woo\Marketplace
+ * @package Automattic\WooUpdateManager
  */
 
+namespace Automattic\WooUpdateManager;
+
 defined( 'ABSPATH' ) || exit;
 
 /**
@@ -17,6 +19,7 @@ class Woo_Subscription_Data_Updater {
 	 *
 	 * @return void
 	 */
+
 	public static function load() {
 		add_filter( 'update_woo_com_subscription_details', [ __CLASS__, 'update_plugin_package_url' ], 10, 3 );
 	}
@@ -53,8 +56,8 @@ public static function update_plugin_package_url( $item, $woo_subscription_data,
 	 * @return bool True if active subscription found.
 	 */
 	public static function has_active_subscription( $product_id ) {
-		$auth          = WC_Helper_Options::get( 'auth' );
-		$subscriptions = WC_Helper::get_subscriptions();
+		$auth          = \WC_Helper_Options::get( 'auth' );
+		$subscriptions = \WC_Helper::get_subscriptions();
 
 		if ( empty( $auth['site_id'] ) || empty( $subscriptions ) ) {
 			return false;
diff --git a/woo-update-manager.php b/woo-update-manager.php
index 43ef309..469d33d 100644
--- a/woo-update-manager.php
+++ b/woo-update-manager.php
@@ -11,11 +11,13 @@
  * Woo: 18734003407318:e4367d0e8d424278fd7049e7d7b567a6
  * Requires at least: 6.0
  * Requires PHP: 7.3
- * Version: 1.0.2
+ * Version: 1.0.3
  *
  * @package Woo\UpdateManager
  */
 
+namespace Automattic\WooUpdateManager;
+
 use Automattic\WooCommerce\Utilities\FeaturesUtil;
 
 defined( 'ABSPATH' ) || exit;
@@ -35,21 +37,22 @@ function clear_update_transients() {
 /**
  * Register activation hook to clear update transients.
  */
-register_activation_hook( __FILE__, 'clear_update_transients' );
+register_activation_hook( __FILE__, __NAMESPACE__ . '\clear_update_transients' );
 
 /**
  * Register de-activation hook to clear update transients.
  */
-register_deactivation_hook( __FILE__, 'clear_update_transients' );
+register_deactivation_hook( __FILE__, __NAMESPACE__ . '\clear_update_transients' );
 
 
 /**
  * Declare compatibility for HPOS compatibility.
  */
-function declare_hpos_compatibility() {
+function declare_wc_feature_compatibility() {
 	if ( class_exists( FeaturesUtil::class ) ) {
 		FeaturesUtil::declare_compatibility( 'custom_order_tables', __FILE__, true );
+		FeaturesUtil::declare_compatibility( 'cart_checkout_blocks', __FILE__, true );
 	}
 }
 
-add_action( 'before_woocommerce_init', 'declare_hpos_compatibility' );
+add_action( 'before_woocommerce_init', __NAMESPACE__ . '\declare_wc_feature_compatibility' );