diff --git a/requirements.txt b/requirements.txt
index 4d98e3c..a613383 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ vfb_connect
 requests
 flask-restplus==0.13
 Werkzeug==0.16.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability