diff --git a/passerelle_imio_liege_rn/models.py b/passerelle_imio_liege_rn/models.py
index e8c48a8..7af4c79 100644
--- a/passerelle_imio_liege_rn/models.py
+++ b/passerelle_imio_liege_rn/models.py
@@ -18,9 +18,9 @@ from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
 from passerelle.base.models import BaseResource
+from passerelle.compat import json_loads
 from passerelle.utils.api import endpoint
 
-import json
 
 
 class ImioLiegeRn(BaseResource):
@@ -59,7 +59,7 @@ class ImioLiegeRn(BaseResource):
         str_data = ''
         if request.body is not None and request.body != b'':
             json_acceptable_string = request.body.replace("'", "\"")
-            data = json.loads(json_acceptable_string)
+            data = json_loads(json_acceptable_string)
             str_data = ''.join([u'&{}={}'.format(k,v) for k,v in data.items()])
         else:
             str_data = '&caller_name={}&caller_user={}&caller_environment={}&caller_version={}&caller_reason={}'.format(caller_name, caller_user,caller_environment,caller_version,caller_reason)