diff --git a/requirements.txt b/requirements.txt
index 07ab8dd..2e45ef0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,3 +17,4 @@ six==1.16.0
 tqdm==4.61.0
 urllib3==1.26.5
 Werkzeug==2.0.1
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability