diff --git a/docs/requirements.txt b/docs/requirements.txt
index d213b45..35b1a57 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -385,7 +385,7 @@ tifffile==2023.8.30
     # via scikit-image
 tinycss2==1.2.1
     # via nbconvert
-tornado==6.3.3
+tornado==6.4.1
     # via
     #   ipykernel
     #   jupyter-client