diff --git a/requirements.txt b/requirements.txt
index c35ba6f..a7eba67 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.1
 Werkzeug==2.2.3
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability