diff --git a/gestioncof/petits_cours_views.py b/gestioncof/petits_cours_views.py
index e9fe511e..c3e43ea8 100644
--- a/gestioncof/petits_cours_views.py
+++ b/gestioncof/petits_cours_views.py
@@ -30,7 +30,7 @@ from captcha.fields import ReCaptchaField
 
 from datetime import datetime
 import base64
-import simplejson
+import json
 
 
 def render_template(template_path, data):
@@ -153,7 +153,7 @@ def _finalize_traitement(request, demande, proposals, proposed_for,
                    "proposed_mails": proposed_mails,
                    "mainmail": mainmail,
                    "attribdata":
-                   base64.b64encode(simplejson.dumps(attribdata)
+                   base64.b64encode(json.dumps(attribdata)
                                               .encode('utf_8')),
                    "redo": redo,
                    "errors": errors,
@@ -262,7 +262,7 @@ def _traitement_post(request, demande):
     extra = request.POST["extra"].strip()
     redo = "redo" in request.POST
     attribdata = request.POST["attribdata"]
-    attribdata = dict(simplejson.loads(base64.b64decode(attribdata)))
+    attribdata = dict(json.loads(base64.b64decode(attribdata)))
     for matiere in demande.matieres.all():
         if matiere.id not in attribdata:
             unsatisfied.append(matiere)
diff --git a/requirements.txt b/requirements.txt
index 23f4d618..f7f6deca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,6 @@ django-grappelli==2.8.1
 django-recaptcha==1.0.5
 mysqlclient==1.3.7
 Pillow==3.3.0
-simplejson==3.8.2
 six==1.10.0
 unicodecsv==0.14.1
 icalendar==3.10