diff --git a/requirements/requirements_tests.txt b/requirements/requirements_tests.txt
index 2a5b0a0..1675a62 100644
--- a/requirements/requirements_tests.txt
+++ b/requirements/requirements_tests.txt
@@ -1 +1,2 @@
-pytest>=4.4.1
\ No newline at end of file
+pytest>=4.4.1
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file