diff --git a/README.md b/README.md
index 62f35e2..b8a11e9 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 Contributors: tarosky, hametuha, Takahashi_Fumiki, bissy    
 Tags: faq,help  
 Tested up to: 7.0  
-Stable Tag: 2.4.1  
+Stable Tag: 2.4.2  
 License: GPL 3.0 or later  
 License URI: https://www.gnu.org/licenses/gpl-3.0.html
 
@@ -113,6 +113,10 @@ You can contribute to our github repo. Any [issues](https://github.com/tarosky/h
 
 For full release notes of each version, see [GitHub Releases](https://github.com/tarosky/hamelp/releases).
 
+### 2.4.2
+
+- Fix the AI Overview send button rendering as an oversized rectangle (with the arrow sometimes hidden) on themes whose button styles overrode the plugin CSS. The button's structural styles are now scoped so theme styles can no longer override its size and shape.
+
 ### 2.4.1
 
 - Redesign the AI Overview question box as a ChatGPT-style auto-growing **textarea** with a circular send button inset at the bottom-right. Submit with **Enter** (Shift+Enter for a newline), with IME composition handled. Adds accessible labels and focus handling, a helper hint, and a responsive full-width layout.
diff --git a/hamelp.php b/hamelp.php
index 73e1417..027350e 100644
--- a/hamelp.php
+++ b/hamelp.php
@@ -3,7 +3,7 @@
  * Plugin Name:     PubPla AI Help Center
  * Plugin URI:      https://wordpress.org/plugins/hamelp
  * Description:     AI powered FAQ and Help Document Management Plugin for WordPress.
- * Version:         2.4.1
+ * Version:         2.4.2
  * Author:          Tarosky
  * Author URI:      https://tarosky.co.jp
  * Domain Path:     /languages
diff --git a/package.json b/package.json
index 54072fe..3de5a05 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "hamelp",
-	"version": "2.4.1",
+	"version": "2.4.2",
 	"description": "FAQ generator for WordPress",
 	"scripts": {
 		"test": "RESULT=${PWD##*/} && wp-env run tests-cli ./wp-content/plugins/$RESULT/vendor/bin/phpunit -c ./wp-content/plugins/$RESULT/phpunit.xml.dist",