diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4822d64..27f72db 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,3 @@
 django
 pycco
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability