diff --git a/backend/src/apiserver/visualization/requirements.txt b/backend/src/apiserver/visualization/requirements.txt
index 25c6922ce09..e57613c77bc 100644
--- a/backend/src/apiserver/visualization/requirements.txt
+++ b/backend/src/apiserver/visualization/requirements.txt
@@ -509,7 +509,7 @@ tfx-bsl==1.9.0
     #   tensorflow-model-analysis
 threadpoolctl==3.2.0
     # via scikit-learn
-tornado==6.3.3
+tornado==6.4.2
     # via
     #   -r requirements.in
     #   bokeh