diff --git a/docs/requirements.txt b/docs/requirements.txt
index cd8c779..7d52d4a 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,3 +2,4 @@ sphinx==5.3.0
 sphinx-copybutton
 sphinx-design
 pydata-sphinx-theme
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability