diff --git a/synthcollectionbook/requirements.txt b/synthcollectionbook/requirements.txt
index 7e821e4..195a7b8 100644
--- a/synthcollectionbook/requirements.txt
+++ b/synthcollectionbook/requirements.txt
@@ -1,3 +1,4 @@
 jupyter-book
 matplotlib
 numpy
+setuptools>=70.0.0 # not directly required, pinned by Snyk to avoid a vulnerability