diff --git a/wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php b/wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php
index 28c7936a36..e81529af07 100644
--- a/wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php
+++ b/wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php
@@ -265,7 +265,13 @@ XSL;
 						color: #444;
 					}
 
+					#sitemap {
+						max-width: 980px;
+						margin: 0 auto;
+					}
+
 					#sitemap__table {
+						width: 100%;
 						border: solid 1px #ccc;
 						border-collapse: collapse;
 					}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 9f5ffb473b..e733e4cc44 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-49220';
+$wp_version = '5.6-alpha-49221';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.