diff --git a/wp-includes/html-api/class-wp-html-open-elements.php b/wp-includes/html-api/class-wp-html-open-elements.php
index 505c1595f4..7f148a7af7 100644
--- a/wp-includes/html-api/class-wp-html-open-elements.php
+++ b/wp-includes/html-api/class-wp-html-open-elements.php
@@ -517,4 +517,13 @@ class WP_HTML_Open_Elements {
 			( $this->pop_handler )( $item );
 		}
 	}
+
+	/**
+	 * Wakeup magic method.
+	 *
+	 * @since 6.6.0
+	 */
+	public function __wakeup() {
+		throw new \LogicException( __CLASS__ . ' should never be unserialized' );
+	}
 }
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 436b7dc5f9..170f3013ec 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-beta3-58440';
+$wp_version = '6.6-beta3-58441';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.