diff --git a/requirements.txt b/requirements.txt
index e6a6397f370..9775c6a33f8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -427,7 +427,7 @@ toolz==1.2.0
     # via
     #   dask
     #   partd
-tornado==6.5.10
+tornado==6.6
     # via
     #   ipykernel
     #   jupyter-client