diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d7cbbc4..cc508700 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.12.0] - 2026-04-11
+
+### Added
+
+- Support customizing the Faraday client in `MCP::Client::HTTP` (#306)
+
+### Changed
+
+- Auto-set `server.transport` in `Transport#initialize` (#305)
+
+### Fixed
+
+- Validate Content-Type on POST requests (#304)
+
 ## [0.11.0] - 2026-04-06
 
 ### Added
diff --git a/lib/mcp/version.rb b/lib/mcp/version.rb
index 4bc1256e..aeddea7f 100644
--- a/lib/mcp/version.rb
+++ b/lib/mcp/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module MCP
-  VERSION = "0.11.0"
+  VERSION = "0.12.0"
 end