diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index b44b28703..adf5fd769 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.4.0"
+  ".": "2.4.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a60c484e2..7414944db 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [2.4.1](https://github.com/microsoft/OpenAPI.NET/compare/v2.4.0...v2.4.1) (2025-12-18)
+
+
+### Bug Fixes
+
+* **schema:** always serialize `additionalProperties: false` ([6651c36](https://github.com/microsoft/OpenAPI.NET/commit/6651c36ff341329c053776d65b36b1b7fa9dd3ea))
+* **schema:** always serialize `additionalProperties: false` ([e36fc95](https://github.com/microsoft/OpenAPI.NET/commit/e36fc9565bce42916eb7bf64d1f74d491dd1f407))
+
 ## [2.4.0](https://github.com/microsoft/OpenAPI.NET/compare/v2.3.12...v2.4.0) (2025-12-17)
 
 
diff --git a/Directory.Build.props b/Directory.Build.props
index caf63957a..2d0fc7255 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -12,7 +12,7 @@
     <PackageProjectUrl>https://github.com/Microsoft/OpenAPI.NET</PackageProjectUrl>
     <Copyright>© Microsoft Corporation. All rights reserved.</Copyright>
     <PackageTags>OpenAPI .NET</PackageTags>
-    <Version>2.4.0</Version>
+    <Version>2.4.1</Version>
   </PropertyGroup>
   <!-- https://github.com/clairernovotny/DeterministicBuilds#deterministic-builds -->
   <PropertyGroup Condition="'$(TF_BUILD)' == 'true'">