diff --git a/src/vips_reference_model/reference_model.py b/src/vips_reference_model/reference_model.py
index 4e87423fa3a11e9f6489b125fb3aa55f0f195fbd..a787ad89689d099807f330c39acb43f41ba7ac47 100644
--- a/src/vips_reference_model/reference_model.py
+++ b/src/vips_reference_model/reference_model.py
@@ -111,8 +111,8 @@ class ReferenceModel(VIPSModel):
         """A sample configuration in JSON format (TODO check relation with Dict)"""
         return """
         {
-	model_id:'REFERENCEM',
-	config_parameters: {
+	modelId:'REFERENCEM',
+	configParameters: {
 		'sowingDate': '2022-03-01', 
 		'observations': [
 			{'timeMeasured': '2015-03-01T00:00:00+01:00', 'elementMeasurementTypeId': 'TM', 'logIntervalId': '2', 'value': '1.41025'},