diff --git a/wp-includes/kses.php b/wp-includes/kses.php
index b7f135377c..fa3b343cac 100644
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -2171,6 +2171,7 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 	 * @since 5.3.0 Added support for `grid`, `flex` and `column` layout properties.
 	 *              Extend `background-*` support of individual properties.
 	 * @since 5.3.1 Added support for gradient backgrounds.
+	 * @since 5.7.1 Added support for `object-position`.
 	 *
 	 * @param string[] $attr Array of allowed CSS attributes.
 	 */
@@ -2284,6 +2285,7 @@ function safecss_filter_attr( $css, $deprecated = '' ) {
 			'direction',
 			'float',
 			'list-style-type',
+			'object-position',
 			'overflow',
 			'vertical-align',
 		)
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ce3328ec8c..3cb6924af9 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7.1-alpha-50630';
+$wp_version = '5.7.1-alpha-50649';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.