diff --git a/grandlyon_iodas/models.py b/grandlyon_iodas/models.py
index 84991a2..a2787b4 100644
--- a/grandlyon_iodas/models.py
+++ b/grandlyon_iodas/models.py
@@ -7,6 +7,7 @@ from suds.transport import Reply
 import suds.sudsobject
 
 from django.db import models
+from django.utils.encoding import force_bytes, force_text
 from django.utils.translation import ugettext_lazy as _
 from django.core.cache import cache
 
@@ -103,7 +104,7 @@ class grandlyonIodas(BaseResource):
                                   deltafindroit = nb if (datetime.strptime(tache['datearret'], "%d/%m/%Y") - dateutil.relativedelta.relativedelta(months=nb)) == datetime.now().replace(hour=0, minute=0, second=0, microsecond=0) else 0
                               droits.append({"libl":tache['produit']['libl'], "dateproposition":tache['dateproposition'], "datearret":tache['datearret'], "dateeffet":tache['dateeffet'], "deltafindroit":deltafindroit})
 
-        return {'hash': hashlib.sha224(json.dumps(data)).hexdigest(),
+        return {'hash': force_text(hashlib.sha224(force_bytes(json.dumps(data)).hexdigest()),
                 'libl': data['procedures']['procedures']['procedure'][nbProc]['libl'] if 'procedures' in data else '',
                 'etapes': sorted(data['procedures']['procedures']['procedure'][nbProc]['etapes']['etape'], key=lambda x: x['id'], reverse=True) if 'procedures' in data else '',
                 'droits': droits,
@@ -127,7 +128,7 @@ class grandlyonIodas(BaseResource):
                 test = proc['libl']
                 procedures.append(proc)
         #print >> open('/home/grandlyon/marln/debug.test', 'a+'), self.get_client().service.ODA_getProceduresPA()
-        return {'hash': hashlib.sha224(json.dumps(data)).hexdigest(),
+        return {'hash': force_text(hashlib.sha224(force_bytes(json.dumps(data))).hexdigest()),
                 #'libl': data['procedurespa']['procedurespa']['procedurepa'][nbProc]['libl'] if 'procedurespa' in data else '',
                 #'procedures': data['procedurespa']['procedurespa']['procedurepa'][nbProc] if 'procedurespa' in data else '',
                 #'procedures': data['procedurespa']['procedurespa']['procedurepa'] if 'procedurespa' in data else '',