diff --git a/requirements.txt b/requirements.txt
index 35ace1c0790..b70ccf0e0fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -433,7 +433,7 @@ toolz==1.1.0
     # via
     #   dask
     #   partd
-tornado==6.5.5
+tornado==6.5.6
     # via
     #   ipykernel
     #   jupyter-client