diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 78e7f27..8032c17 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.11.0"
+  ".": "0.12.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 740cdf1..a138f7c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [0.12.0](https://github.com/shigechika/mcp-stdio/compare/v0.11.0...v0.12.0) (2026-05-07)
+
+
+### Features
+
+* **oauth:** select token_endpoint_auth_method from AS metadata (RFC 8414) ([#62](https://github.com/shigechika/mcp-stdio/issues/62)) ([9e6feff](https://github.com/shigechika/mcp-stdio/commit/9e6feff050db056e039716f3bbc2ea076833dba9))
+
+
+### Bug Fixes
+
+* **test:** add missing path-aware PRM mock in TestDiscoverMetadataAuthMethods ([df06108](https://github.com/shigechika/mcp-stdio/commit/df06108a21beb468d6e38c74b24cbfc2c3b10c4b))
+
 ## [0.11.0](https://github.com/shigechika/mcp-stdio/compare/v0.10.1...v0.11.0) (2026-05-07)
 
 
diff --git a/src/mcp_stdio/__init__.py b/src/mcp_stdio/__init__.py
index 22dd5b9..cbfebc1 100644
--- a/src/mcp_stdio/__init__.py
+++ b/src/mcp_stdio/__init__.py
@@ -1,5 +1,5 @@
 """mcp-stdio: Stdio-to-HTTP relay for MCP servers."""
 
 # x-release-please-start-version
-__version__ = "0.11.0"
+__version__ = "0.12.0"
 # x-release-please-end