diff --git a/requirements.txt b/requirements.txt
index 84dd76d42a..2a96b82fe3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,7 +67,7 @@ soupsieve==2.3.2
 stack-data==0.5.0
 terminado==0.15.0
 testpath==0.6.0
-tornado==6.3.3
+tornado==6.4.1
 traitlets==5.3.0
 urllib3==1.26.18
 wcwidth==0.2.5