diff --git a/requirements_docs_CI.txt b/requirements_docs_CI.txt
index 109d1f5..0c2d0ae 100644
--- a/requirements_docs_CI.txt
+++ b/requirements_docs_CI.txt
@@ -286,7 +286,7 @@ stack-data==0.6.3
     # via ipython
 tabulate==0.9.0
     # via jupyter-cache
-tornado==6.4.2
+tornado==6.5.0
     # via
     #   ipykernel
     #   jupyter-client