diff --git a/requirements.txt b/requirements.txt
index 0847e5e0f..256aa4967 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -77,7 +77,7 @@ toml==0.10.2
     # via
     #   black
     #   pre-commit
-tornado==6.1
+tornado==6.3.3
     # via livereload
 unidecode==1.3.4
     # via pelican