diff --git a/requirements_test.txt b/requirements_test.txt
index c299019..156cadd 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -12,3 +12,4 @@ pytest
 pytest-cov
 pytest-runner
 readme_renderer
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability