diff --git a/requirements.txt b/requirements.txt
index e9247d2..b0e6ca6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ matplotlib==2.2.3
 numpy==1.26.0
 pyastronomy==0.13.0
 scipy==1.8.0
+setuptools>=70.0.0 # not directly required, pinned by Snyk to avoid a vulnerability