diff --git a/requirements.txt b/requirements.txt
index eb72600fe3..3b9293afc2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -84,3 +84,4 @@ urllib3>=1.26,<2
 weasyprint>=64.1
 xml2rfc>=3.23.0
 xym>=0.6,<1.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability