diff --git a/requirements.txt b/requirements.txt
index 46969c7..b42cd9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -102,7 +102,7 @@ terminado==0.8.3
 testpath==0.4.4
 threadpoolctl==2.1.0
 toolz==0.10.0
-tornado==6.0.4
+tornado==6.5.1
 traceback2==1.4.0
 traitlets==4.3.3
 unittest2==1.1.0