diff --git a/requirements-dev.txt b/requirements-dev.txt
index 93dd1c3..198f07f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,3 +5,4 @@ pytest>=6.2.1
 twine==3.3.0
 pypandoc>=1.5
 wheel>=0.31.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability