diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index e20d7e81..0d1bebe1 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.5.1"
+  ".": "1.6.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6fa00dc1..8fcbed15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.6.0](https://github.com/agentclientprotocol/codex-acp/compare/v1.5.1...v1.6.0) (2026-08-19)
+
+
+### Features
+
+* harden release pipeline against hangs and e2e flakes ([#413](https://github.com/agentclientprotocol/codex-acp/issues/413)) ([39af81c](https://github.com/agentclientprotocol/codex-acp/commit/39af81c29b79a85f878db096f9cb593b6d1c7429))
+
 ## [1.5.1](https://github.com/agentclientprotocol/codex-acp/compare/v1.5.0...v1.5.1) (2026-08-19)
 
 
diff --git a/package-lock.json b/package-lock.json
index bc9e60c6..98b1d764 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@agentclientprotocol/codex-acp",
-  "version": "1.5.1",
+  "version": "1.6.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@agentclientprotocol/codex-acp",
-      "version": "1.5.1",
+      "version": "1.6.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@agentclientprotocol/sdk": "^1.3.0",
diff --git a/package.json b/package.json
index 10d94e7b..1915d9b9 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "publishConfig": {
     "access": "public"
   },
-  "version": "1.5.1",
+  "version": "1.6.0",
   "description": "",
   "main": "dist/index.js",
   "bin": {