diff --git a/src/authentic2_auth_fedict/__init__.py b/src/authentic2_auth_fedict/__init__.py
index d20ce62..72451db 100644
--- a/src/authentic2_auth_fedict/__init__.py
+++ b/src/authentic2_auth_fedict/__init__.py
@@ -88,7 +88,7 @@ class Plugin(object):
                 'label': _('National Register Number'),
                 'name': 'nrn',
                 'serialize': json.dumps,
-                'deserialize': json.loads,
+                'deserialize': attribute_json_loads,
                 'field_class': fields.NrnField,
             },
             {
@@ -108,14 +108,14 @@ class Plugin(object):
             {
                 'label': _('Street'),
                 'serialize': json.dumps,
-                'deserialize': json.loads,
+                'deserialize': attribute_json_loads,
                 'name': 'street',
                 'field_class': fields.StreetField,
             },
             {
                 'label': _('House number'),
                 'serialize': json.dumps,
-                'deserialize': json.loads,
+                'deserialize': attribute_json_loads,
                 'name': 'num_house',
                 'field_class': fields.NumHouseField,
             },
@@ -136,7 +136,7 @@ class Plugin(object):
             {
                 'label': _('Country'),
                 'serialize': json.dumps,
-                'deserialize': json.loads,
+                'deserialize': attribute_json_loads,
                 'name': 'country',
                 'field_class': fields.CountryField,
             },