diff --git a/requirements.txt b/requirements.txt
index c10843c..81528e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -71,7 +71,7 @@ Send2Trash==1.5.0
 six==1.12.0
 terminado==0.8.2
 testpath==0.4.2
-tornado==6.0.3
+tornado==6.3.2
 traitlets==4.3.3
 urllib3==1.26.5
 wcwidth==0.1.7