diff --git a/requirements-docs.txt b/requirements-docs.txt
index 5936b90..3c27c3b 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -1,3 +1,4 @@
 mkdocs~=1.5.3
 mkdocs-material~=9.5.3
 mkdocstrings[python]~=0.24.0
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability