diff --git a/requirements/requirements_docs.txt b/requirements/requirements_docs.txt
index 9f2fad8..9183b12 100644
--- a/requirements/requirements_docs.txt
+++ b/requirements/requirements_docs.txt
@@ -7,3 +7,4 @@ sphinx
 #m2r2
 sphinxcontrib-programoutput
 warg
+zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability