diff --git a/history.en.md b/history.en.md
index 59ebd7f..bab0906 100644
--- a/history.en.md
+++ b/history.en.md
@@ -1,6 +1,8 @@
 # History
 
  - master/HEAD
+ - 1.6.4 (2024.5.18)
+   * Copy tabs correctly without any infinite loop, even if there is any tab having its ID at its `openerTabId`, e.g. a tab after "detaching" from its opener by TST or something tree management addon.
  - 1.6.3 (2024.4.9)
    * Fix incompatibility around new clipboard API on Firefox 116 and later ([by Decimation. Thanks!](https://github.com/piroor/copy-selected-tabs-to-clipboard/pull/52))
  - 1.6.2 (2023.11.14)
diff --git a/history.ja.md b/history.ja.md
index 6e45956..a44e27e 100644
--- a/history.ja.md
+++ b/history.ja.md
@@ -1,6 +1,8 @@
 # 更新履歴
 
  - master/HEAD
+ - 1.6.4 (2024.5.18)
+   * TSTで親タブからデタッチされた後のタブなど、`openerTabId`にそのタブ自身のIDを持つタブがあるときにコピー操作に失敗する（無限ループに陥る）問題を修正
  - 1.6.3 (2024.4.9)
    * Firefox 116以降でのクリップボードAPIの仕様変更に追従（[by Decimation. Thanks!](https://github.com/piroor/copy-selected-tabs-to-clipboard/pull/52)）
  - 1.6.2 (2023.11.14)
diff --git a/manifest.json b/manifest.json
index 6675f01..e427d46 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "__MSG_extensionName__",
-  "version": "1.6.3",
+  "version": "1.6.4",
   "author": "YUKI \"Piro\" Hiroshi",
   "description": "__MSG_extensionDescription__",
   "permissions": [