diff --git a/requirements.txt b/requirements.txt
index 4e972fd..d1e23d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,3 +40,4 @@ tqdm==4.54.1
 typing-extensions==3.7.4.3
 urllib3==1.26.2
 Werkzeug==1.0.1
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability