diff --git a/requirements_dev.txt b/requirements_dev.txt
index 08eab16a..f4e747c0 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -12,3 +12,4 @@ ptvsd==4.3.2
 freezegun==0.3.12
 watchdog==0.9.0
 ptpython==3.0.17
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability