diff --git a/requirements.txt b/requirements.txt
index 48f068c..4d08ce8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ sniffio==1.3.0
 soupsieve==2.4.1
 terminado==0.17.1
 tinycss2==1.2.1
-tornado==6.3.1
+tornado==6.4.1
 traitlets==5.9.0
 uri-template==1.2.0
 webcolors==1.13