diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 4a458770..969a63da 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.83.0"
+  ".": "0.84.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3242c477..8e3885d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.84.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.83.0...v0.84.0) (2026-09-28)
+
+
+### Features
+
+* **deps:** update Claude SDK ([#1189](https://github.com/agentclientprotocol/claude-agent-acp/issues/1189)) ([d5e6f33](https://github.com/agentclientprotocol/claude-agent-acp/commit/d5e6f33046614fca4798d49f0c77edba951a6771))
+
 ## [0.83.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.82.0...v0.83.0) (2026-09-28)
 
 
diff --git a/package-lock.json b/package-lock.json
index 4f25898b..46c8dfbf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@agentclientprotocol/claude-agent-acp",
-  "version": "0.83.0",
+  "version": "0.84.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@agentclientprotocol/claude-agent-acp",
-      "version": "0.83.0",
+      "version": "0.84.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@agentclientprotocol/sdk": "1.5.1",
diff --git a/package.json b/package.json
index d2ee1236..871ee25f 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "publishConfig": {
     "access": "public"
   },
-  "version": "0.83.0",
+  "version": "0.84.0",
   "description": "An ACP-compatible coding agent powered by the Claude Agent SDK (TypeScript)",
   "main": "dist/lib.js",
   "types": "dist/lib.d.ts",