diff --git a/src/omi/dialects/oep/parser.py b/src/omi/dialects/oep/parser.py
index 5e4e3ed..d7eaa61 100644
--- a/src/omi/dialects/oep/parser.py
+++ b/src/omi/dialects/oep/parser.py
@@ -337,7 +337,7 @@ def parse(self, json_old: dict, *args, **kwargs):
                             for field in old_fields
                         ]
                     field_dict = {field.name: field for field in fields or []}
-                    old_foreign_keys = old_schema.get("foreignKeys")
+                    old_foreign_keys = old_schema.get("foreignKeys", [])
                     foreign_keys = []
                     for fk in old_foreign_keys:
                         old_reference = fk.get("reference")