diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc1efee..a5cada7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,12 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
+## [0.12.1] - 2025-02-12
+
+### Fixed
+
+- Fix superfluous header writer ([#89])
+
 ## [0.12.0] - 2025-01-18
 
 ### Changed
@@ -222,6 +228,7 @@ It contains instrumentation for trace and depends on:
 - Example code for a basic usage.
 - Apache-2.0 license.
 
+[#89]: https://github.com/riandyrn/otelchi/pull/89
 [#88]: https://github.com/riandyrn/otelchi/pull/88
 [#87]: https://github.com/riandyrn/otelchi/pull/87
 [#74]: https://github.com/riandyrn/otelchi/pull/74
@@ -253,7 +260,8 @@ It contains instrumentation for trace and depends on:
 [#2]: https://github.com/riandyrn/otelchi/pull/2
 [#1]: https://github.com/riandyrn/otelchi/pull/1
 
-[Unreleased]: https://github.com/riandyrn/otelchi/compare/v0.12.0...HEAD
+[Unreleased]: https://github.com/riandyrn/otelchi/compare/v0.12.1...HEAD
+[0.12.1]: https://github.com/riandyrn/otelchi/releases/tag/v0.12.1
 [0.12.0]: https://github.com/riandyrn/otelchi/releases/tag/v0.12.0
 [0.11.0]: https://github.com/riandyrn/otelchi/releases/tag/v0.11.0
 [0.10.1]: https://github.com/riandyrn/otelchi/releases/tag/v0.10.1
diff --git a/examples/basic/go.mod b/examples/basic/go.mod
index 72c3ddb..0c7bf3b 100644
--- a/examples/basic/go.mod
+++ b/examples/basic/go.mod
@@ -6,7 +6,7 @@ replace github.com/riandyrn/otelchi => ../../
 
 require (
 	github.com/go-chi/chi/v5 v5.1.0
-	github.com/riandyrn/otelchi v0.11.0
+	github.com/riandyrn/otelchi v0.12.1
 	go.opentelemetry.io/otel v1.34.0
 	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.34.0
 	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.34.0
diff --git a/examples/multi-services/go.mod b/examples/multi-services/go.mod
index d7c3bc5..b9b0d87 100644
--- a/examples/multi-services/go.mod
+++ b/examples/multi-services/go.mod
@@ -6,7 +6,7 @@ replace github.com/riandyrn/otelchi => ../../
 
 require (
 	github.com/go-chi/chi/v5 v5.1.0
-	github.com/riandyrn/otelchi v0.12.0
+	github.com/riandyrn/otelchi v0.12.1
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.56.0
 	go.opentelemetry.io/otel v1.34.0
 	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.34.0
diff --git a/version/version.go b/version/version.go
index e7a0e5f..366119d 100644
--- a/version/version.go
+++ b/version/version.go
@@ -2,5 +2,5 @@ package version
 
 // Version is the current release version of otelchi in use.
 func Version() string {
-	return "0.12.0"
+	return "0.12.1"
 }