diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 762ed040..abe672d7 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "6.3.0-beta.8"
+  ".": "6.3.0-beta.9"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9aa29465..f8256549 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## [6.3.0-beta.9](https://github.com/adcontextprotocol/adcp-client-python/compare/v6.3.0-beta.8...v6.3.0-beta.9) (2026-06-06)
+
+
+### Features
+
+* **codegen:** fail consolidate on unallowlisted name collisions ([#919](https://github.com/adcontextprotocol/adcp-client-python/issues/919)) ([d9367a0](https://github.com/adcontextprotocol/adcp-client-python/commit/d9367a0b20d2884146f207b13b11e3a0820911a8))
+* **registry:** community-mirror lifecycle + upsert client (JS [#2183](https://github.com/adcontextprotocol/adcp-client-python/issues/2183)/[#2187](https://github.com/adcontextprotocol/adcp-client-python/issues/2187) parity) ([#929](https://github.com/adcontextprotocol/adcp-client-python/issues/929)) ([11e5cda](https://github.com/adcontextprotocol/adcp-client-python/commit/11e5cda9821bc6ce3b99d031b661121caaaa2e37))
+
+
+### Bug Fixes
+
+* **adagents:** pin DNS to close rebinding TOCTOU on SSRF gate ([#920](https://github.com/adcontextprotocol/adcp-client-python/issues/920)) ([51de333](https://github.com/adcontextprotocol/adcp-client-python/commit/51de3336dc0a6a79d3dbfbfc51462a9c67ffc266)), closes [#757](https://github.com/adcontextprotocol/adcp-client-python/issues/757)
+* **types:** derive response arms from schemas ([#922](https://github.com/adcontextprotocol/adcp-client-python/issues/922)) ([70abb5a](https://github.com/adcontextprotocol/adcp-client-python/commit/70abb5aca884a5af3b9339b3d9da73832bf22034))
+
 ## [6.3.0-beta.8](https://github.com/adcontextprotocol/adcp-client-python/compare/v6.3.0-beta.7...v6.3.0-beta.8) (2026-06-05)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 5401c5e2..f0871bc8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "adcp"
-version = "6.3.0b8"
+version = "6.3.0b9"
 description = "Official Python client for the Ad Context Protocol (AdCP)"
 authors = [
     {name = "AdCP Community", email = "maintainers@adcontextprotocol.org"}