diff --git a/src/wp-admin/includes/update-core.php b/src/wp-admin/includes/update-core.php
index aee5436305..fea68cbad2 100644
--- a/src/wp-admin/includes/update-core.php
+++ b/src/wp-admin/includes/update-core.php
@@ -798,6 +798,9 @@ $_old_files = array(
 	'wp-admin/css/ie.min.css',
 	'wp-admin/css/ie-rtl.css',
 	'wp-admin/css/ie-rtl.min.css',
+	// 5.6
+	'wp-includes/js/jquery/ui/position.min.js',
+	'wp-includes/js/jquery/ui/widget.min.js',
 );
 
 /**