diff --git a/.github/release-please/manifest.json b/.github/release-please/manifest.json
index 0bbe194..eafb614 100644
--- a/.github/release-please/manifest.json
+++ b/.github/release-please/manifest.json
@@ -1 +1 @@
-{".":"0.4.1"}
+{".":"0.4.2"}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bef5930..9eb8098 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## [0.4.2](https://github.com/do-pa/itdoc/compare/v0.4.1...v0.4.2) (2025-10-06)
+
+
+### 🩹 Fixes
+
+* ensure header keys are case-insensitive ([#251](https://github.com/do-pa/itdoc/issues/251)) ([db8251a](https://github.com/do-pa/itdoc/commit/db8251aa4a8de3b51cebcae0d48b4d653e445d5d))
+* functional response validation failure ([#246](https://github.com/do-pa/itdoc/issues/246)) ([e1dc575](https://github.com/do-pa/itdoc/commit/e1dc57509f47fa559c0e0eb40ce18274f438d4f9))
+* resolve syntax error in generated openapi json ([#253](https://github.com/do-pa/itdoc/issues/253)) ([fd47b61](https://github.com/do-pa/itdoc/commit/fd47b61056d6cc21ad4b85e154a41184d4a186e8))
+
 ## [0.4.1](https://github.com/do-pa/itdoc/compare/v0.4.0...v0.4.1) (2025-08-21)
 
 
diff --git a/package.json b/package.json
index 1b7f7ba..f7da953 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "itdoc",
-    "version": "0.4.1",
+    "version": "0.4.2",
     "description": "Test-driven documentation for RESTful services",
     "license": "Apache-2.0",
     "bin": {