diff --git a/docs/requirements.txt b/docs/requirements.txt
index 803fee9..e199894 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -4,3 +4,4 @@ sphinxcontrib-napoleon
 sphinx-autoapi
 sphinx-design
 sphinxcontrib-bibtex
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability