diff --git a/backend/src/apiserver/visualization/requirements-test.txt b/backend/src/apiserver/visualization/requirements-test.txt
index 5746800b..39b57548 100644
--- a/backend/src/apiserver/visualization/requirements-test.txt
+++ b/backend/src/apiserver/visualization/requirements-test.txt
@@ -3,4 +3,4 @@ jupyter_client==5.2.4
 nbconvert==5.5.0
 nbformat==4.4.0
 snapshottest==0.5.1
-tornado==6.0.2
\ No newline at end of file
+tornado==6.3.3
\ No newline at end of file
diff --git a/backend/src/apiserver/visualization/requirements.txt b/backend/src/apiserver/visualization/requirements.txt
index ae27d4dd..0979f180 100644
--- a/backend/src/apiserver/visualization/requirements.txt
+++ b/backend/src/apiserver/visualization/requirements.txt
@@ -13,4 +13,4 @@ scikit_learn==0.21.2
 tensorflow-metadata==0.21.1
 tensorflow-model-analysis==0.21.5
 tensorflow-data-validation==0.21.1
-tornado==6.0.2
+tornado==6.3.3