diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9bac75f..4f4a3f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2026-01-27
+
 ### Added
 - Support for 5 new ignore file parsers (Issue #5):
   - **remark** (`.remarkignore`) - Markdown processor ignore file
@@ -128,7 +130,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Examples for CI/CD integration
 - Contributing guidelines
 
-[Unreleased]: https://github.com/mensfeld/lostconf/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/mensfeld/lostconf/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/mensfeld/lostconf/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/mensfeld/lostconf/compare/v0.2.1...v0.3.0
 [0.2.1]: https://github.com/mensfeld/lostconf/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/mensfeld/lostconf/compare/v0.1.0...v0.2.0
diff --git a/package.json b/package.json
index ebcb168..049e3e8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "lostconf",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "A meta-linter that detects stale references in configuration files",
   "type": "module",
   "main": "dist/index.js",
diff --git a/src/cli.ts b/src/cli.ts
index 4126d82..3c0beb3 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -19,7 +19,7 @@ const program = new Command();
 program
   .name('lostconf')
   .description('A meta-linter that detects stale references in configuration files')
-  .version('0.3.0')
+  .version('0.4.0')
   .argument('[paths...]', 'Paths to scan (default: current directory)')
   .option('-f, --format <fmt>', 'Output format: text, json, sarif', 'text')
   .option('-o, --output <file>', 'Write to file instead of stdout')
diff --git a/tests/integration/cli.test.ts b/tests/integration/cli.test.ts
index 010ed08..1b2631a 100644
--- a/tests/integration/cli.test.ts
+++ b/tests/integration/cli.test.ts
@@ -38,7 +38,7 @@ describe('CLI Integration Tests', () => {
   it('should show version with --version', async () => {
     const { stdout } = await execAsync(`node ${cliPath} --version`);
 
-    expect(stdout).toContain('0.3.0');
+    expect(stdout).toContain('0.4.0');
   });
 
   it('should output text format by default', async () => {