diff --git a/02_Notebook_and_Pipenv/requirements.txt b/02_Notebook_and_Pipenv/requirements.txt
index afc06c5..39da6ab 100644
--- a/02_Notebook_and_Pipenv/requirements.txt
+++ b/02_Notebook_and_Pipenv/requirements.txt
@@ -135,7 +135,7 @@ threadpoolctl==3.3.0 ; python_version >= '3.8'
 tinycss2==1.2.1 ; python_version >= '3.7'
 toml==0.10.2 ; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'
 toolz==0.12.1 ; python_version >= '3.7'
-tornado==6.4.1 ; python_version >= '3.8'
+tornado==6.4.2 ; python_version >= '3.8'
 tqdm==4.66.2 ; python_version >= '3.7'
 traitlets==5.14.1 ; python_version >= '3.8'
 typeguard==4.1.5 ; python_version >= '3.8'