diff --git a/requirements-dev.txt b/requirements-dev.txt
index 432090a..df4636f 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,4 @@
 -r requirements.txt
 pdoc3
 black
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability