diff --git a/requirements.txt b/requirements.txt
index e5d266d..8f7767d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-tornado==4.4.2
+tornado==6.3.2
 python_dateutil==2.6.1
 pyephem==3.7.6.0