diff --git a/server/requirements.txt b/server/requirements.txt
index 63f3147..87a63f5 100644
--- a/server/requirements.txt
+++ b/server/requirements.txt
@@ -1,3 +1,3 @@
 jinja2>=2.11.3
 MarkupSafe==1.1.0
-tornado==5.1.1
+tornado==6.3.3