diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 465e1a2a..7aa3d567 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "4.4.3"
+  ".": "4.5.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ca00958..468d899a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [4.5.0](https://github.com/adcontextprotocol/adcp-client-python/compare/v4.4.3...v4.5.0) (2026-05-07)
+
+
+### Features
+
+* **auth:** per-leg header config + agent-card bearerAuth scheme ([#595](https://github.com/adcontextprotocol/adcp-client-python/issues/595)) ([52f45ef](https://github.com/adcontextprotocol/adcp-client-python/commit/52f45efbc4e2ba20bbb824e3b86b17d171d7570b))
+
+
+### Bug Fixes
+
+* **client:** preserve agent_uri trailing slash; widen MCP URL fallbacks ([#582](https://github.com/adcontextprotocol/adcp-client-python/issues/582)) ([1db3ce3](https://github.com/adcontextprotocol/adcp-client-python/commit/1db3ce3d585bdc8af2425078981b53e69f1f49ce))
+
 ## [4.4.3](https://github.com/adcontextprotocol/adcp-client-python/compare/v4.4.2...v4.4.3) (2026-05-05)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index abb00342..f773da8d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "adcp"
-version = "4.4.3"
+version = "4.5.0"
 description = "Official Python client for the Ad Context Protocol (AdCP)"
 authors = [
     {name = "AdCP Community", email = "maintainers@adcontextprotocol.org"}