diff --git a/sdk/python/pyproject.toml b/sdk/python/pyproject.toml
index 9d5ea2e..4b0aaf7 100644
--- a/sdk/python/pyproject.toml
+++ b/sdk/python/pyproject.toml
@@ -18,7 +18,7 @@ classifiers = [
   "Programming Language :: Python :: 3",
   "Programming Language :: Rust",
 ]
-dependencies = ["agent-hooks-sdk==0.1.0a3"]
+dependencies = ["agent-hooks-sdk==0.1.0a4"]
 
 [project.urls]
 Repository = "https://github.com/responsibleai/agent-control-spec"
diff --git a/sdk/python/requirements-dev.in b/sdk/python/requirements-dev.in
index ba7abc9..4efd1be 100644
--- a/sdk/python/requirements-dev.in
+++ b/sdk/python/requirements-dev.in
@@ -1,4 +1,4 @@
-agent-hooks-sdk==0.1.0a3
+agent-hooks-sdk==0.1.0a4
 maturin==1.14.1
 pytest
 ruff