diff --git a/history.en.md b/history.en.md
index db5801555..fa2a49706 100644
--- a/history.en.md
+++ b/history.en.md
@@ -1,6 +1,7 @@
 # History
 
  - master/HEAD
+ - 3.5.23 (2020.8.26)
    * Drop support for some built-in themes: ["Vertigo"](https://github.com/piroor/treestyletab/wiki/Vertigo-theme-%28patch-for-the-theme-%22Plain%22%29) and ["Mixed"](https://github.com/piroor/treestyletab/wiki/Mixed-theme-%28patch-for-the-theme-%22Plain%22%29). They can be alternated with [user styles](https://github.com/piroor/treestyletab/wiki/Code-snippets-for-custom-style-rules#restore-old-built-in-themes).
    * Simulate appearance of close boxes in Firefox's native tabs more, for hover and active state.
    * Close the tab by click on the close box, even if the cursor has moved out from the close box and went back while the button is pressed, like close boxes in Firefox's native tabs.
diff --git a/history.ja.md b/history.ja.md
index 8affaa7aa..542f76a47 100644
--- a/history.ja.md
+++ b/history.ja.md
@@ -1,6 +1,7 @@
 # 更新履歴
 
  - master/HEAD
+ - 3.5.23 (2020.8.26)
    * 組み込みのテーマの["Vertigo"](https://github.com/piroor/treestyletab/wiki/Vertigo-theme-%28patch-for-the-theme-%22Plain%22%29)と["Mixed"](https://github.com/piroor/treestyletab/wiki/Mixed-theme-%28patch-for-the-theme-%22Plain%22%29)を削除した（[ユーザースタイル定義](https://github.com/piroor/treestyletab/wiki/Code-snippets-for-custom-style-rules#restore-old-built-in-themes)での代替は可能です）
    * タブのクローズボックスのhover時とactive時の見た目をFirefoxのタブのクローズボックスに合わせるようにした
    * タブのクローズボックス上でボタンを押してボタン外までドラッグし、再びボタン上にカーソルを戻してボタンを放したときに、Firefoxのタブ同様にタブを閉じるようにした（動作を揃えるようにした）
diff --git a/webextensions/manifest.json b/webextensions/manifest.json
index 9653df636..813cd1bab 100644
--- a/webextensions/manifest.json
+++ b/webextensions/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "__MSG_extensionName__",
-  "version": "3.5.22",
+  "version": "3.5.23",
   "author": "YUKI \"Piro\" Hiroshi",
   "description": "__MSG_extensionDescription__",
   "permissions": [