diff --git a/requirements.txt b/requirements.txt
index 0f1e684f..de5f6abc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,3 +67,4 @@ werkzeug==0.16.1
 # ldap3==2.2.4
 Authlib==0.15.5
 advocate==1.0.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability