diff --git a/requirements.txt b/requirements.txt
index 6704767ec..024772f11 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 Flask==0.12.2
-gunicorn
\ No newline at end of file
+gunicorn
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file