diff --git a/requirements-dev.txt b/requirements-dev.txt
index c6ccce9..f8667fd 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,3 +6,4 @@ flake8>=3.9.2
 mypy>=0.910
 
 isort>=5.9.3
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability