diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 9965a34..a549f59 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.3.0"
+  ".": "2.4.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 262a8d5..b654737 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [2.4.0](https://github.com/adcontextprotocol/adcp-client-python/compare/v2.3.0...v2.4.0) (2025-11-18)
+
+
+### Features
+
+* Add is_fixed discriminator to pricing types ([#56](https://github.com/adcontextprotocol/adcp-client-python/issues/56)) ([e47ff66](https://github.com/adcontextprotocol/adcp-client-python/commit/e47ff66e0b1a58132fe8e940f4bfc8917642113d))
+
 ## [2.3.0](https://github.com/adcontextprotocol/adcp-client-python/compare/v2.2.0...v2.3.0) (2025-11-17)
 
 
diff --git a/pyproject.toml b/pyproject.toml
index f737b95..a14a207 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "adcp"
-version = "2.3.0"
+version = "2.4.0"
 description = "Official Python client for the Ad Context Protocol (AdCP)"
 authors = [
     {name = "AdCP Community", email = "maintainers@adcontextprotocol.org"}
diff --git a/src/adcp/__init__.py b/src/adcp/__init__.py
index 4071c03..0f9df5a 100644
--- a/src/adcp/__init__.py
+++ b/src/adcp/__init__.py
@@ -136,7 +136,7 @@
     validate_publisher_properties_item,
 )
 
-__version__ = "2.3.0"
+__version__ = "2.4.0"
 
 __all__ = [
     # Client classes