diff --git a/readme.txt b/readme.txt
index adfe1c78..f1403938 100644
--- a/readme.txt
+++ b/readme.txt
@@ -37,6 +37,7 @@ https://www.vektor-inc.co.jp/inquiry/
 
 == Changelog ==
 
+v15.28.0
 [ G3 / G2 ][ Specification Change ] Added support for the "Writing Mode" option in Typography settings for WordPress 6.7.
 
 v15.27.2
diff --git a/style.css b/style.css
index 96a2ab8c..3bcc5519 100644
--- a/style.css
+++ b/style.css
@@ -5,7 +5,7 @@ Theme URI: https://lightning.vektor-inc.co.jp/en/
 Description: Lightning is a very simple & easy to customize theme which is based on the Bootstrap. It is also very friendly with custom post types and custom taxonomies. When you add a new one, the breadcrumbs will be adjusted and posts will look beautifully without editing or adding a template files.
 Author: Vektor,Inc.
 Author URI: https://www.vektor-inc.co.jp
-Version: 15.27.2
+Version: 15.28.0
 Requires at least: 6.2
 Tested up to: 6.7
 Requires PHP: 7.4