diff --git a/opencog/python/attic/requirements.txt b/opencog/python/attic/requirements.txt
index 4c6c986ff36..34a5f9496f4 100644
--- a/opencog/python/attic/requirements.txt
+++ b/opencog/python/attic/requirements.txt
@@ -13,3 +13,4 @@ flask-cors
 mock
 six
 graphviz
+jinja2>=3.1.3 # not directly required, pinned by Snyk to avoid a vulnerability