diff --git a/tools/requirements.txt b/tools/requirements.txt
index 0bd5da1..35383cd 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -1,3 +1,4 @@
 pandas==1.2.0
 requests==2.31.0
 matplotlib==3.3.3
+pillow>=10.2.0 # not directly required, pinned by Snyk to avoid a vulnerability