diff --git a/docs/requirements.txt b/docs/requirements.txt
index ed82fbbf..8b9a4ebf 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -15,3 +15,4 @@ pysolr
 nbformat>=4.2.0
 numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
 zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability
+ujson>=5.12.0 # not directly required, pinned by Snyk to avoid a vulnerability