diff --git a/requirements.txt b/requirements.txt
index ab5a882..0a8ba69 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,3 +8,4 @@ dill;sys_platform!="win32"
 multiprocess
 psutil
 wrapt
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability