diff --git a/requirements-test.txt b/requirements-test.txt
index 2b86893340..1f9db666e2 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -12,3 +12,4 @@ seaborn
 xarray>=0.13
 wheel
 pyarrow
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability