diff --git a/requirements.txt b/requirements.txt
index 112f63a..e804154 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 paramiko==2.7.1
 tornado==5.1.1; python_version < '3.5'
-tornado==6.0.3; python_version >= '3.5'
+tornado==6.0.4; python_version >= '3.5'