diff --git a/helm-chart/images/binderhub/requirements.txt b/helm-chart/images/binderhub/requirements.txt
index f1fdb8dbc..9220f993f 100644
--- a/helm-chart/images/binderhub/requirements.txt
+++ b/helm-chart/images/binderhub/requirements.txt
@@ -151,7 +151,7 @@ sqlalchemy==1.4.23
     # via
     #   alembic
     #   jupyterhub
-tornado==6.1
+tornado==6.4.2
     # via
     #   -r binderhub.in
     #   jupyterhub