diff --git a/pyproject.toml b/pyproject.toml
index ce50453..ff244dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ foundry = [
 agent = [
   "fastapi>=0.110",
   "uvicorn[standard]>=0.30",
-  "httpx>=0.27",
+  "httpx>=0.28.1",
   "cryptography>=42",
   "markdown>=3.6",
   "azure-monitor-query>=1.3",