diff --git a/requirements.txt b/requirements.txt
index 07f0b8300..23be2d3d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,4 +22,5 @@ Flask-CacheBuster
 flask-cors
 waitress
 lxml
-packaging
\ No newline at end of file
+packaging
+numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file