diff --git a/requirements.txt b/requirements.txt
index 8e6cfb8..987d609 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 h2==3.0.1
-tornado==4.5.2
+tornado==6.3.3
 mock==2.0.0
 nose==1.3.7