diff --git a/requirements.txt b/requirements.txt
index 34d242e..905c2d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ requests-aws4auth==0.9
 aenum==2.2.2
 gremlinpython==3.4.4
 isodate==0.6.0
-tornado==4.5.3
+tornado==6.3.3
 
 # pip install redis
 redis==3.3.11