diff --git a/requirements-test.txt b/requirements-test.txt
index 413bcd6..7d2c07c 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,2 +1,3 @@
 pytest==5.3.5
-mock==2.0.0
\ No newline at end of file
+mock==2.0.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file