diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52ab45c..5216373 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]
 
+## [0.12.3] - 2026-09-15
+
 ### Changed
 - Allow JSON 3.x and require Faraday 2.14.4 or newer for compatible response parsing (#123).
 
@@ -186,7 +188,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Migrated from legacy ingestion API to OTLP endpoint
 - Removed `tracing_enabled` configuration flag (#2)
 
-[Unreleased]: https://github.com/simplepractice/langfuse-rb/compare/v0.12.2...HEAD
+[Unreleased]: https://github.com/simplepractice/langfuse-rb/compare/v0.12.3...HEAD
+[0.12.3]: https://github.com/simplepractice/langfuse-rb/compare/v0.12.2...v0.12.3
 [0.12.2]: https://github.com/simplepractice/langfuse-rb/compare/v0.12.1...v0.12.2
 [0.12.1]: https://github.com/simplepractice/langfuse-rb/compare/v0.12.0...v0.12.1
 [0.12.0]: https://github.com/simplepractice/langfuse-rb/compare/v0.11.0...v0.12.0
diff --git a/Gemfile.lock b/Gemfile.lock
index 60e7da1..53e9228 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    langfuse-rb (0.12.2)
+    langfuse-rb (0.12.3)
       base64 (~> 0.2)
       concurrent-ruby (>= 1.3.7, < 2.0)
       faraday (>= 2.14.4, < 3)
diff --git a/lib/langfuse/version.rb b/lib/langfuse/version.rb
index eca4402..45dc4a4 100644
--- a/lib/langfuse/version.rb
+++ b/lib/langfuse/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Langfuse
-  VERSION = "0.12.2"
+  VERSION = "0.12.3"
 end