diff --git a/src/main/resources/cds.application.yaml b/src/main/resources/cds.application.yaml
index da76591..3224316 100644
--- a/src/main/resources/cds.application.yaml
+++ b/src/main/resources/cds.application.yaml
@@ -268,7 +268,7 @@ hapi:
     # -------------------------------------------------------------------------------
     # allow_cascading_deletes: true
     # allow_contains_searches: true
-    # allow_external_references: true
+    allow_external_references: true
     # allow_multiple_delete: true
     # allow_override_default_search_params: true
     # auto_create_placeholder_reference_targets: false