diff --git a/requirements.txt b/requirements.txt
index 7c849f7..0c1f4c7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ pydantic>=2.5
 slowapi>=0.1.9
 prometheus_client>=0.20
 redis>=5.0
-httpx>=0.27
+httpx>=0.28.1
 PyJWT>=2.8
 # Observability (optional but recommended)
 opentelemetry-api>=1.25