diff --git a/requirements-dev.txt b/requirements-dev.txt
index c87bf44..a1f174d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,4 @@
 pre-commit>=0.13
 unittest
 nose
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability