diff --git a/requirements.txt b/requirements.txt
index 72acbf2..06bec19 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -131,7 +131,7 @@ testpath==0.6.0
 threadpoolctl==3.1.0
 tinycss2==1.2.1
 tomli==2.0.1
-tornado==6.3.3
+tornado==6.4.1
 tqdm==4.66.3
 traitlets==5.8.1
 uri-template==1.2.0