diff --git a/bench/requirements.txt b/bench/requirements.txt
index d08d1c890..58147b89c 100644
--- a/bench/requirements.txt
+++ b/bench/requirements.txt
@@ -1,3 +1,3 @@
-tornado==4.3
+tornado==5.1
 paramiko==1.16.0
 boto==2.38.0