diff --git a/backend_server/requirements.txt b/backend_server/requirements.txt
index 7c9128b5..d5ec193e 100644
--- a/backend_server/requirements.txt
+++ b/backend_server/requirements.txt
@@ -1,4 +1,4 @@
 psycopg2-binary==2.8.2
 queries==2.0.1
-tornado==6.0.2
+tornado==6.3.3
 tornado-swagger==1.2.3