diff --git a/requirements.txt b/requirements.txt
index 05c3c5b..c76fbc3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -99,7 +99,7 @@ stack-data==0.2.0
 tinycss2==1.4.0
 toml==0.10.2
 tomli==1.2.2
-tornado==6.2
+tornado==6.4.2
 traitlets==5.7.1
 twilio==6.63.0
 typed-ast==1.4.3