diff --git a/antarest/study/business/binding_constraint_management.py b/antarest/study/business/binding_constraint_management.py
index 3c55ef38da..95dfd305c2 100644
--- a/antarest/study/business/binding_constraint_management.py
+++ b/antarest/study/business/binding_constraint_management.py
@@ -12,7 +12,6 @@
 
 import collections
 import copy
-import json
 import logging
 import typing as t
 
@@ -854,7 +853,7 @@ def update_binding_constraints(
                 raise BindingConstraintNotFound(f"Binding constraint '{bc_id}' not found")
 
             props = create_binding_constraint_config(study_version, **value.dict())
-            new_values = json.loads(props.json(by_alias=True, exclude_unset=True))
+            new_values = props.model_dump(mode='json', by_alias=True, exclude_unset=True)
             upd_obj = config[dict_config[bc_id]]
             current_value = copy.deepcopy(upd_obj)
             upd_obj.update(new_values)