diff --git a/requirements.txt b/requirements.txt
index c5e7bdd..a211730 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ fastapi>=0.111.0
 uvicorn[standard]>=0.30.0
 pydantic>=2.7.0
 pytest>=8.2.0
-httpx>=0.27.0
+httpx>=0.28.1
 python-dotenv>=1.0.1
 sqlmodel>=0.0.39
 langgraph>=0.1.0