diff --git a/requirements.txt b/requirements.txt
index 212eb1d..7971357 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,6 +16,6 @@ python-dateutil==2.8.1
 regex==2020.7.14
 six==1.15.0
 toml==0.10.1
-tornado==6.5.1
+tornado==6.5.5
 typed-ast==1.4.1
 wrapt==1.12.1