diff --git a/kfet/views.py b/kfet/views.py
index 4b356d43..50704f6d 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -1301,21 +1301,21 @@ def history_json(request):
 
 
     # Construction de la réponse
-    opegroups_list = []
+    ope_list = []
     for opegroup in opegroups:
         opegroup_dict = {
             'id'         : opegroup.id,
             'amount'     : opegroup.amount,
             'at'         : opegroup.at,
-            'checkout_id': opegroup.checkout_id,
             'is_cof'     : opegroup.is_cof,
             'comment'    : opegroup.comment,
-            'opes'       : [],
-            'on_acc__trigramme':
+            'trigramme':
                     opegroup.on_acc and opegroup.on_acc.trigramme or None,
+            'day': {'id': opegroup.at.strftime('%Y%m%d'),
+                    'date': opegroup.at},
         }
         if request.user.has_perm('kfet.is_team'):
-            opegroup_dict['valid_by__trigramme'] = (
+            opegroup_dict['valid_by'] = (
                 opegroup.valid_by and opegroup.valid_by.trigramme or None)
         for ope in opegroup.opes.all():
             ope_dict = {
@@ -1326,17 +1326,17 @@ def history_json(request):
                 'is_checkout'   : ope.is_checkout,
                 'addcost_amount': ope.addcost_amount,
                 'canceled_at'   : ope.canceled_at,
-                'article__name':
+                'article_name':
                     ope.article and ope.article.name or None,
-                'addcost_for__trigramme':
+                'addcost_for':
                     ope.addcost_for and ope.addcost_for.trigramme or None,
+                'opegroup': opegroup_dict,
             }
             if request.user.has_perm('kfet.is_team'):
-                ope_dict['canceled_by__trigramme'] = (
+                ope_dict['canceled_by'] = (
                     ope.canceled_by and ope.canceled_by.trigramme or None)
-            opegroup_dict['opes'].append(ope_dict)
-        opegroups_list.append(opegroup_dict)
-    return JsonResponse({ 'opegroups': opegroups_list })
+            ope_list.append(ope_dict)
+    return JsonResponse(ope_list, safe=False)
 
 
 @teamkfet_required