diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -138,7 +138,7 @@ nbconvert==7.7.3
       python-dateutil==2.9.0.post0
         six==1.16.0
       pyzmq==25.0.0
-      tornado==6.2
+      tornado==6.4.1
       traitlets==5.14.3
     jupyter_core==5.3.1
       platformdirs==3.10.0