diff --git a/requirements_dev.txt b/requirements_dev.txt
index 16ff43196..01d6387f2 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -13,3 +13,4 @@ Click>=6.0
 dlib>=19.3.0
 numpy
 scipy
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability