diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 00000000..cd88320e
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,18 @@
+# Changelog
+## [0.4.0] - 2025-10-25
+
+### Added
+- feat: add comprehensive testing and error tracking for edit mode
+
+### Fixed
+- fix: resolve md-render --edit functionality and add enhanced version tracking
+- fix: resolve critical JavaScript syntax errors in md-render --edit
+- fix: resolve md-ingest Path object conversion error
+
+### Other
+- chore: clean up repository documentation files for release
+
+
+
+All notable changes to MarkiTect will be documented in this file.
+
diff --git a/markitect/__version__.py b/markitect/__version__.py
index e65c099a..83b81887 100644
--- a/markitect/__version__.py
+++ b/markitect/__version__.py
@@ -11,7 +11,7 @@ from pathlib import Path
 from typing import Optional
 
 # Base version from pyproject.toml
-__version__ = "0.3.0"
+__version__ = "0.4.0"
 
 def get_git_commit_hash() -> Optional[str]:
     """Get the current git commit hash if available."""
diff --git a/pyproject.toml b/pyproject.toml
index cf98a4f0..ba6b4f43 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "markitect"
-version = "0.3.0"
+version = "0.4.0"
 description = "Advanced Markdown engine for structured content"
 readme = "README.md"
 requires-python = ">=3.8"