diff --git a/requirements.txt b/requirements.txt
index 4dfbb69..4ebf0ca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,6 +16,6 @@ scipy==1.3.1
 sendgrid==6.1.0
 six==1.12.0
 SQLAlchemy==1.3.10
-tornado==5.1.1
+tornado==6.3.3
 tqdm==4.36.1
 typing==3.7.4.1