diff --git a/requirements.txt b/requirements.txt
index d6c197e..5fa034c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ numpy>=1.14.0
 pandas>=0.20.3
 scikit-learn>=0.20.0
 seaborn>=0.9.0
+pillow>=10.3.0 # not directly required, pinned by Snyk to avoid a vulnerability