diff --git a/history.en.md b/history.en.md
index 6abf0980f..664781291 100644
--- a/history.en.md
+++ b/history.en.md
@@ -1,6 +1,7 @@
 # History
 
  - master/HEAD
+ - 3.8.13 (2021.10.3)
    * Fix unexpectedly invisible children when a parent tab is restored and collapsed tabs are re-attached to the restored parent.
    * Outdent tab via API correctly when a child tab is outdented to the root level with its descendants.
    * Update `zh_CN` locale by [NightSharp](https://github.com/NightSharp). Thanks!
diff --git a/history.ja.md b/history.ja.md
index dcc459d84..ab4c4f8f7 100644
--- a/history.ja.md
+++ b/history.ja.md
@@ -1,6 +1,7 @@
 # 更新履歴
 
  - master/HEAD
+ - 3.8.13 (2021.10.3)
    * 閉じられた親タブを開き直して、折りたたまれた状態のタブが復元された親タブの配下に移動されたときに、それらのタブが見えない状態のままになっていたのを修正
    * API経由でタブが1つ上の階層に移動されたときに、移動先が最上位階層の場合子孫タブが置き去りになっていたのを修正
    * `zh_CN`ロケール更新（by [NightSharp](https://github.com/NightSharp), thanks!）
diff --git a/webextensions/manifest.json b/webextensions/manifest.json
index 13099df1f..e26d8fe51 100644
--- a/webextensions/manifest.json
+++ b/webextensions/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "__MSG_extensionName__",
-  "version": "3.8.12",
+  "version": "3.8.13",
   "author": "YUKI \"Piro\" Hiroshi",
   "description": "__MSG_extensionDescription__",
   "permissions": [