diff --git a/requirements.txt b/requirements.txt
index 166505a08..345b39d5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,6 +38,8 @@ sdnotify==0.3.2
 
 # API Server
 fastapi==0.135.1
+# TODO: starlette should not be pinned, but had breaking changes in 1.0.0.
+starlette<1.0.0
 pydantic==2.12.5
 uvicorn==0.41.0
 pyjwt==2.12.0