diff --git a/requirements.txt b/requirements.txt
index 6714ddc..60d9182 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 backports.ssl-match-hostname==3.4.0.2
 jsonrpclib==0.1.3
 nose==1.3.0
-tornado==3.2
+tornado==6.3.3
 wsgiref==0.1.2