diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc0d528..cecb708 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,11 @@
 Changelog
 =========
 
+## 2.3.1 (2022/01/30)
+
+- Fix that 'Sign-in endpoint in current region' breaks a switch role on some page like Chatbot
+- Fix that the icon's background becomes gray if it is transparent
+
 ## 2.3.0 (2022/01/11)
 
 - Implement 'Sign-in endpoint in current region' setting (Experimental, Supporters only)
diff --git a/LICENSE b/LICENSE
index 1c620bf..86d87e9 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2016-2021 Toshimitsu Takahashi (Tilfin Ltd.)
+Copyright (c) 2016-2022 Toshimitsu Takahashi (Tilfin Ltd.)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/manifest.json b/manifest.json
index 5d8f7c8..6d501dd 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,5 +1,5 @@
 {
-  "version": "2.3.0",
+  "version": "2.3.1",
   "name": "AWS Extend Switch Roles",
   "description": "Extend your AWS IAM switching roles. You can set the configuration like aws config format",
   "short_name": "Extend SwitchRole",
diff --git a/package.json b/package.json
index 0924cd1..c48aa79 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aws-extend-switch-roles",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "description": "Extend your AWS IAM switching roles by Chrome extension",
   "main": "index.js",
   "directories": {
diff --git a/updated.html b/updated.html
index ffe311f..834ba6c 100644
--- a/updated.html
+++ b/updated.html
@@ -14,8 +14,9 @@
     margin: 0;
   }
   a { text-decoration: none }
-  h1, h2, p { margin: .5em 0 }
+  h1, h2, h3, p { margin: .5em 0 }
   h2 { font-size: 18px; }
+  h3 { font-size: 16px; }
   section { margin: 20px 0 }
   code {
     color: #222;
@@ -30,16 +31,28 @@
   <h1 style="margin:0">AWS Extend Switch Roles - Update Notice</h1>
 
   <section>
-    <h2>2.3.0 &nbsp;<span style="color: rgb(221, 63, 0)">New version!</span></h2>
+    <h2 style="color:#0099f2">Recent main updates</h2>
+    <h3>'Sign-in endpoint in current region' setting (Experimental, Supporters only)</h3>
+    <p>
+      The 'Switch role' requests to the sign-in endpoint in the current region instead of <i>signin.aws.amazon.com</i> when you browse a non-global page in AWS Management Console.
+      For those working geographically far from Virginia, the switch roll may be a little faster.
+    </p>
+
+    <hr style="margin:18px 0">
+
+    <h2>2.3.1 <span style="margin-left:0.75em; color:rgb(221, 63, 0)">New version!</span></h2>
+    <ul>
+      <li>Fix that 'Sign-in endpoint in current region' breaks a switch role on some page like Chatbot</li>
+      <li>Fix that the icon's background becomes gray if it is transparent</li>
+    </ul>
+
+    <h2>2.3.0</h2>
     <ul>
-      <li><b>Implement 'Sign-in endpoint in current region' setting (Experimental, Supporters only)</b><br>
-        The 'Switch role' requests to the sign-in endpoint in the current region instead of <i>signin.aws.amazon.com</i> when you browse a non-global page in AWS Management Console.
-        For those working geographically far from Virginia, the switch roll may be a little faster.
-      </li>
+      <li><b>Implement 'Sign-in endpoint in current region' setting (Experimental, Supporters only)</b></li>
       <li>Fix how to get sign-in endpoint from AWS Console page</li>
       <li>Fix that switching sometimes fails on new experience pages</li>
     </ul>
-    <hr>
+
     <h2>2.2.0</h2>
     <ul>
       <li><b>Support 'role_name' parameter that expresses the name of role at login, on base account</b></li>