diff --git a/requirements_dev.txt b/requirements_dev.txt
index 5c0e590..a6201a5 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -287,7 +287,7 @@ stack-data==0.6.3
     # via ipython
 tomli-w==1.2.0
     # via tox
-tornado==6.5.7
+tornado==6.5.8
     # via
     #   ipykernel
     #   jupyter-client