diff --git a/bda/admin.py b/bda/admin.py
index 064f8482..1c66ebfa 100644
--- a/bda/admin.py
+++ b/bda/admin.py
@@ -52,6 +52,7 @@ class ParticipantAdmin(admin.ModelAdmin):
     actions = ['send_attribs',]
     actions_on_bottom = True
     list_per_page = 400
+    readonly_fields = ("total",)
 
     def send_attribs(self, request, queryset):
         for member in queryset.all():
@@ -142,9 +143,16 @@ class SpectacleAdmin(admin.ModelAdmin):
     list_filter = ("location",)
     search_fields = ("title", "location__name")
 
+class TirageAdmin(admin.ModelAdmin):
+    model = Tirage
+    list_display = ("title", "ouverture", "fermeture", "active")
+    readonly_fields = ("token", )
+    list_filter = ("active", )
+    search_fields = ("title", )
+
 admin.site.register(Spectacle, SpectacleAdmin)
 admin.site.register(Salle)
 admin.site.register(Participant, ParticipantAdmin)
 admin.site.register(Attribution, AttributionAdmin)
 admin.site.register(ChoixSpectacle, ChoixSpectacleAdmin)
-admin.site.register(Tirage)
+admin.site.register(Tirage, TirageAdmin)
diff --git a/bda/algorithm.py b/bda/algorithm.py
index bce41282..a6caf531 100644
--- a/bda/algorithm.py
+++ b/bda/algorithm.py
@@ -1,5 +1,7 @@
 # coding: utf-8
 
+from __future__ import division
+
 from django.conf import settings
 from django.db.models import Max
 
@@ -62,7 +64,7 @@ class Algorithm(object):
     def __call__(self, seed):
         random.seed(seed)
         results = []
-        shows = sorted(self.shows, key = lambda x: float(x.nrequests) / x.slots, reverse = True)
+        shows = sorted(self.shows, key = lambda x: x.nrequests / x.slots, reverse = True)
         for show in shows:
             # On regroupe tous les gens ayant le même rang
             groups = dict([(i, []) for i in range(1, self.max_group + 1)])
diff --git a/bda/views.py b/bda/views.py
index c5b13d9c..2b7b9c6d 100644
--- a/bda/views.py
+++ b/bda/views.py
@@ -1,5 +1,7 @@
 # coding: utf-8
 
+from __future__ import division
+
 from django.contrib.auth.models import User
 from django.shortcuts import render, get_object_or_404
 from django.contrib.auth.decorators import login_required
@@ -50,13 +52,13 @@ def etat_places(request, tirage_id):
         spectacles_dict[spectacle["spectacle"]].total += spectacle["total"]
         spectacles_dict[spectacle["spectacle"]].ratio = \
             spectacles_dict[spectacle["spectacle"]].total / \
-            float(spectacles_dict[spectacle["spectacle"]].slots)
+            spectacles_dict[spectacle["spectacle"]].slots
         total += spectacle["total"]  
     for spectacle in spectacles2:
         spectacles_dict[spectacle["spectacle"]].total += 2*spectacle["total"]
         spectacles_dict[spectacle["spectacle"]].ratio = \
             spectacles_dict[spectacle["spectacle"]].total / \
-            float(spectacles_dict[spectacle["spectacle"]].slots)
+            spectacles_dict[spectacle["spectacle"]].slots
         total += spectacle["total"]  
     return render(request, "etat-places.html",
             {"spectacles": spectacles, "total": total, 'tirage': tirage})