diff --git a/tools/rag-application-using-vector-search/backend/poller_job/requirements.txt b/tools/rag-application-using-vector-search/backend/poller_job/requirements.txt
index 6651c844a0..3b35c4e7ec 100644
--- a/tools/rag-application-using-vector-search/backend/poller_job/requirements.txt
+++ b/tools/rag-application-using-vector-search/backend/poller_job/requirements.txt
@@ -21,7 +21,7 @@ idna==3.10
 numpy==2.2.5
 packaging==25.0
 proto-plus==1.26.1
-protobuf==6.31.1
+protobuf==6.33.5
 pyasn1==0.6.2
 pyasn1_modules==0.4.2
 pydantic==2.11.3