diff --git a/src/wp-includes/class-wp-block.php b/src/wp-includes/class-wp-block.php
index 732e0e347052f..c18684475d1d4 100644
--- a/src/wp-includes/class-wp-block.php
+++ b/src/wp-includes/class-wp-block.php
@@ -112,6 +112,7 @@ class WP_Block {
 		'core/image'     => array( 'id', 'url', 'title', 'alt' ),
 		'core/button'    => array( 'url', 'text', 'linkTarget', 'rel' ),
 		'core/post-date' => array( 'datetime' ),
+		'core/pullquote' => array( 'value', 'citation' ),
 	);
 
 	/**