diff --git a/requirements.txt b/requirements.txt
index d6c197e..f49d70f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,5 @@ numpy>=1.14.0
 pandas>=0.20.3
 scikit-learn>=0.20.0
 seaborn>=0.9.0
+fonttools>=4.43.0 # not directly required, pinned by Snyk to avoid a vulnerability
+pillow>=10.3.0 # not directly required, pinned by Snyk to avoid a vulnerability