diff --git a/docs/requirements.txt b/docs/requirements.txt
index 0d94cbb0..628e052c 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,4 @@
 sphinx-rtd-theme==0.5.2
 sphinxcontrib-contentui==0.2.5
 aiohttp>=3.9.2,<4
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability