diff --git a/jupyter-6.4.0-with-base-packages/requirements.txt b/jupyter-6.4.0-with-base-packages/requirements.txt
index 3dd879d6..5191500b 100644
--- a/jupyter-6.4.0-with-base-packages/requirements.txt
+++ b/jupyter-6.4.0-with-base-packages/requirements.txt
@@ -4,3 +4,4 @@ matplotlib
 plotly
 seaborn
 gen3
+marshmallow>=3.26.2 # not directly required, pinned by Snyk to avoid a vulnerability