diff --git a/requirements.txt b/requirements.txt
index 574b1c0a69..841c5a97cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ voluptuous==0.13.1
 PyYAML==6.0.1
 paho-mqtt==1.6.1
 colorama==0.4.6
-tornado==6.3.3
+tornado==6.4
 tzlocal==5.2    # from time
 tzdata>=2021.1  # from time
 pyserial==3.5