diff --git a/history.en.md b/history.en.md
index e25bcc9..39c8025 100644
--- a/history.en.md
+++ b/history.en.md
@@ -1,6 +1,8 @@
 # History
 
  - master/HEAD
+ - 6.1.1 (2020.6.8)
+   * Fix unexpected slow-down of keyboard input in text fields.
  - 6.1.0 (2020.3.10)
    * Fix invisible context menu commands on text selection.
    * Fix broken options page on lately versions Firefox.
diff --git a/history.ja.md b/history.ja.md
index 68d8500..3cc03c3 100644
--- a/history.ja.md
+++ b/history.ja.md
@@ -1,6 +1,8 @@
 # 更新履歴
 
  - master/HEAD
+ - 6.1.1 (2020.6.8)
+   * テキスト入力欄でのキー入力操作が意図せず激遅になっていたのを修正
  - 6.1.0 (2020.3.10)
    * 選択範囲の上でのコンテキストメニューコマンドのラベルが見えなくなっていたのを修正
    * Firefoxの最近のバージョンで設定画面が機能しなくなっていたのを修正
diff --git a/webextensions/manifest.json b/webextensions/manifest.json
index f2737ad..4df6b03 100644
--- a/webextensions/manifest.json
+++ b/webextensions/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "__MSG_extensionName__",
-  "version": "6.1.0",
+  "version": "6.1.1",
   "author": "YUKI \"Piro\" Hiroshi",
   "description": "__MSG_extensionDescription__",
   "permissions": [