diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..4bc7f4c
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,18 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [3.0.1] - 2025-12-16
+
+### Fixed
+- **Agent Task Cancellation**: Fixed an issue where Agent tasks would continue running in the background after cancellation.
+- **Event Streaming**: Resolved `UnboundLocalError` in `event_manager.py` and removed artificial delays to prevent event queue buildup.
+- **Agent Timeout**: Increased Verification Agent timeout to 10 minutes to support complex PoC generation.
+- **LLM Streaming**: Improved robustness of `stream_llm_call` with explicit string timeouts to prevent hanging.
+
+## [3.0.0] - 2025-12-15
+
+### Added
+- **Multi-Agent System**: Introduced Orchestrator, Recon, Analysis, and Verification agents for autonomous security auditing.
+- **RAG Integration**: Added Retrieval-Augmented Generation for better code understanding.
+- **Docker Sandbox**: Implemented secure environment for tool execution.
diff --git a/README.md b/README.md
index 300f1c2..2194811 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
 
 <div align="center">
 
-[![Version](https://img.shields.io/badge/version-3.0.0-blue.svg)](https://github.com/lintsinghua/DeepAudit/releases)
+[![Version](https://img.shields.io/badge/version-3.0.1-blue.svg)](https://github.com/lintsinghua/DeepAudit/releases)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![React](https://img.shields.io/badge/React-18-61dafb.svg)](https://reactjs.org/)
 [![TypeScript](https://img.shields.io/badge/TypeScript-5.7-3178c6.svg)](https://www.typescriptlang.org/)
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index a900bb7..3424446 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "deepaudit-backend"
-version = "3.0.0"
+version = "3.0.1"
 description = "DeepAudit Backend API - AI-Powered Code Security Audit Platform"
 requires-python = ">=3.11"
 readme = "README.md"
diff --git a/frontend/package.json b/frontend/package.json
index 5ef44d3..6d039a6 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "deep-audit",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "type": "module",
   "scripts": {
     "dev": "vite",