diff --git a/requirements.txt b/requirements.txt
index a79d8bc0..2a26b67b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ python-dateutil==2.7.5
 watchdog==0.9.0
 pytz==2018.9
 fire==0.1.3
-tornado==6.3.3
+tornado==6.4.1
 markdown==3.0.1
 semver==2.8.1
 websocket==0.2.1