diff --git a/src/requirements.txt b/src/requirements.txt
index 5b7d944..c2ea6c3 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -244,7 +244,7 @@ tinycss2==1.2.1
 toml==0.10.2
 tomli==2.0.1
 toposort==1.10
-tornado==6.4
+tornado==6.4.2
 tqdm==4.66.1
 traitlets==5.9.0
 traittypes==0.2.1