diff --git a/requirements.txt b/requirements.txt
index c52b8e1d8e..9ec3a9c8f9 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==6.3.2
+tornado==6.3.3
 tzlocal==5.0.1    # from time
 tzdata>=2021.1  # from time
 pyserial==3.5