diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 71cce632..d311c30d 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "6.2.0-beta.4"
+  ".": "6.3.0-beta.4"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47ec112f..d734a5d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [6.3.0-beta.4](https://github.com/adcontextprotocol/adcp-client-python/compare/v6.2.0-beta.4...v6.3.0-beta.4) (2026-05-26)
+
+
+### Features
+
+* allow externally managed webhook signing capabilities ([#876](https://github.com/adcontextprotocol/adcp-client-python/issues/876)) ([3c312a0](https://github.com/adcontextprotocol/adcp-client-python/commit/3c312a0dacea1c99535dac0bac68db54a6301d26))
+
 ## [6.2.0-beta.4](https://github.com/adcontextprotocol/adcp-client-python/compare/v6.2.0-beta.3...v6.2.0-beta.4) (2026-05-26)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 2e6795ea..bb258c79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "adcp"
-version = "6.2.0b4"
+version = "6.3.0b4"
 description = "Official Python client for the Ad Context Protocol (AdCP)"
 authors = [
     {name = "AdCP Community", email = "maintainers@adcontextprotocol.org"}