diff --git a/docs/requirements.txt b/docs/requirements.txt
index f9bf003..5fe3ba8 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -552,7 +552,7 @@ tinycss2==1.4.0
     # via bleach
 tomlkit==0.14.0
     # via pylint
-tornado==6.5.5
+tornado==6.5.6
     # via
     #   ipykernel
     #   jupyter-client