diff --git a/src/ingest-pipeline/requirements.txt b/src/ingest-pipeline/requirements.txt
index 8d4e024e..94e79007 100644
--- a/src/ingest-pipeline/requirements.txt
+++ b/src/ingest-pipeline/requirements.txt
@@ -26,3 +26,4 @@ globus-cli==1.12.0
 yattag==1.14.0
 frictionless==4.0.0
 sqlalchemy==1.3
+xmlschema>=1.6