diff --git a/docs/python/requirements.txt b/docs/python/requirements.txt
index 8bfb4e15bdea5..23760c3688af8 100644
--- a/docs/python/requirements.txt
+++ b/docs/python/requirements.txt
@@ -4,3 +4,4 @@ pyquickhelper
 tensorflow
 tensorflow-onnx
 
+jinja2>=3.1.3 # not directly required, pinned by Snyk to avoid a vulnerability