diff --git a/gestioncof/petits_cours_views.py b/gestioncof/petits_cours_views.py
index 303cec2c..ee71d1a9 100644
--- a/gestioncof/petits_cours_views.py
+++ b/gestioncof/petits_cours_views.py
@@ -146,9 +146,7 @@ def _finalize_traitement(request, demande, proposals, proposed_for,
                    "proposed_for": proposed_for,
                    "proposed_mails": proposed_mails,
                    "mainmail": mainmail,
-                   "attribdata":
-                   base64.b64encode(json.dumps(attribdata)
-                                              .encode('utf_8')),
+                   "attribdata": json.dumps(attribdata),
                    "redo": redo,
                    "errors": errors,
                    })
@@ -258,7 +256,7 @@ def _traitement_post(request, demande):
     extra = request.POST["extra"].strip()
     redo = "redo" in request.POST
     attribdata = request.POST["attribdata"]
-    attribdata = dict(json.loads(base64.b64decode(attribdata)))
+    attribdata = dict(json.loads(attribdata))
     for matiere in demande.matieres.all():
         if matiere.id not in attribdata:
             unsatisfied.append(matiere)