diff --git a/samples/durable-task-sdks/python/agent-directed-workflows/requirements.txt b/samples/durable-task-sdks/python/agent-directed-workflows/requirements.txt
index 232a0d16..cc1f75ae 100644
--- a/samples/durable-task-sdks/python/agent-directed-workflows/requirements.txt
+++ b/samples/durable-task-sdks/python/agent-directed-workflows/requirements.txt
@@ -3,5 +3,5 @@ durabletask-azuremanaged>=1.9.0
 fastapi>=0.136.1
 uvicorn>=0.52.4
 redis>=8.1.0
-openai>=3.20.0
+openai>=3.28.0
 azure-identity>=1.25.3