diff --git a/readme.txt b/readme.txt
index 036e847c..6717ad61 100644
--- a/readme.txt
+++ b/readme.txt
@@ -2,7 +2,7 @@
 Lightning WordPress theme, Copyright (C) 2015-2024 Vektor,Inc.
 Lightning WordPress theme is licensed under the GPL.
 Tested up to: 6.5
-Stable tag: 15.21.1
+Stable tag: 15.22.0
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -37,6 +37,7 @@ https://www.vektor-inc.co.jp/inquiry/
 
 == Changelog ==
 
+v15.22.0
 [ G3 / G2 ][ Specification Change ] Support navigation operations using the Tab key.
 [ G3 ][ Design Bug Fix ][ OriginIII ] Fixed text-decoration-color color for parent elements with `has-black-background-color` class or elements with `has-text-color` class.
 
diff --git a/style.css b/style.css
index 61ab6db5..8ffea08e 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: 15.21.1
+Version: 15.22.0
 Requires at least: 5.9
 Tested up to: 6.5
 Requires PHP: 5.6.0