diff --git a/app/db/normalizations.py b/app/db/normalizations.py
index 35da538..0ea21ec 100644
--- a/app/db/normalizations.py
+++ b/app/db/normalizations.py
@@ -105,7 +105,7 @@ def normalize_header_invoice_fields(fd: Dict[str, Any]) -> Dict[str, Any]:
         "operation_date": str(fd['FECHA_FACTURA']),
         "description": textwrap.shorten(
             f"{str(fd['REFERENCIA'])} - {str(fd.get('NOMBRE')) or ''}", width=50, placeholder="…"),
-        "notes": str(fd["OBSERVACIONES"]),
+        "notes": fd["OBSERVACIONES"],
         # siempre tendrán 2 decimales
         'subtotal_amount_value': cents(fd.get('IMPORTE_NETO')),
         'discount_amount_value': cents(fd.get('IMPORTE_DESCUENTO')),