diff --git a/pip-requirements.txt b/pip-requirements.txt
index e59d530..510c719 100644
--- a/pip-requirements.txt
+++ b/pip-requirements.txt
@@ -70,7 +70,7 @@ terminado==0.12.1
 testpath==0.5.0
 toml==0.10.2
 toolz==0.11.2
-tornado==6.1
+tornado==6.4.1
 traitlets==5.1.1
 tzdata==2021.5
 tzlocal==4.1