diff --git a/wp-content/themes/twentyseventeen/assets/css/editor-style.css b/wp-content/themes/twentyseventeen/assets/css/editor-style.css
index 00a412d4f6..749af42c10 100644
--- a/wp-content/themes/twentyseventeen/assets/css/editor-style.css
+++ b/wp-content/themes/twentyseventeen/assets/css/editor-style.css
@@ -24,7 +24,7 @@ Description: Used to style the TinyMCE editor.
 body {
 	background-color: #fff;
 	color: #333;
-	margin: 20px 40px;
+	margin: auto 20px;
 	max-width: 580px;
 }
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 480acfd664..93736dfe6c 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-50587';
+$wp_version = '5.7.1-alpha-50588';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.