diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7263d83..a7fe4e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 各節はそのversion公開時点の変更記録であり、後続versionにより置換された仕様を含む。
 現行runtime契約は[`docs/00_overview.md`](https://github.com/kitepon/Spotter/blob/main/docs/00_overview.md)から辿る。
 
-## Unreleased
+## 1.9.0 — 2026-10-03
 
 - Spotter自身が端末内runtime-errorの累計をBugHubへ送るopt-in CLIを追加。署名済み受領だけでackし、既定では通信しない。
 
diff --git a/package-lock.json b/package-lock.json
index cdf193c..c68a65d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "claude-spotter",
-  "version": "1.8.1",
+  "version": "1.9.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "claude-spotter",
-      "version": "1.8.1",
+      "version": "1.9.0",
       "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index be56e3f..266b111 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "claude-spotter",
-  "version": "1.8.1",
+  "version": "1.9.0",
   "description": "Audit agent running alongside Claude Code that catches missed tool calls — 気づく役と実行する役の分離",
   "type": "module",
   "bin": {