diff --git a/gestiojeux/settings_base.py b/gestiojeux/settings_base.py
index 1d8a5b3..697a044 100644
--- a/gestiojeux/settings_base.py
+++ b/gestiojeux/settings_base.py
@@ -39,6 +39,7 @@ MIDDLEWARE = [
     "django.contrib.auth.middleware.AuthenticationMiddleware",
     "django.contrib.messages.middleware.MessageMiddleware",
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
+    'django_cas_ng.middleware.CASMiddleware'
 ]
 
 ROOT_URLCONF = "gestiojeux.urls"
@@ -61,6 +62,11 @@ TEMPLATES = [
 
 WSGI_APPLICATION = "gestiojeux.wsgi.application"
 
+AUTHENTICATION_BACKENDS = (
+    'django.contrib.auth.backends.ModelBackend',
+    'django_cas_ng.backends.CASBackend',
+)
+
 # Password validation
 # https://docs.djangoproject.com/en/3.0/ref/settings/#auth-password-validators
 
@@ -78,3 +84,10 @@ AUTH_PASSWORD_VALIDATORS = [
 
 STATIC_URL = "/static/"
 MEDIA_URL = "/media/"
+
+CAS_SERVER_URL = "https://cas.eleves.ens.fr/"
+CAS_VERSION = "2"
+CAS_LOGIN_MSG = None
+CAS_IGNORE_REFERER = True
+CAS_EMAIL_FORMAT = "%s@clipper.ens.fr"
+
diff --git a/gestiojeux_auth/migrations/0001_initial.py b/gestiojeux_auth/migrations/0001_initial.py
new file mode 100644
index 0000000..199923c
--- /dev/null
+++ b/gestiojeux_auth/migrations/0001_initial.py
@@ -0,0 +1,22 @@
+# Generated by Django 3.1.2 on 2020-10-21 19:57
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('auth', '0012_alter_user_first_name_max_length'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='CasUser',
+            fields=[
+                ('user', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, primary_key=True, serialize=False, to='auth.user')),
+            ],
+        ),
+    ]
diff --git a/gestiojeux_auth/views.py b/gestiojeux_auth/views.py
index 331a52a..e02b196 100644
--- a/gestiojeux_auth/views.py
+++ b/gestiojeux_auth/views.py
@@ -30,7 +30,7 @@ def login(req):
             "cas_url": reverse("gestiojeux_auth:cas_ng_login"),
         }
 
-    return render(req, "registration/login_switch.html", context=context)
+    return render(req, "login_switch.html", context=context)
 
 
 @login_required
diff --git a/inventory/migrations/0002_auto_20201021_2157.py b/inventory/migrations/0002_auto_20201021_2157.py
new file mode 100644
index 0000000..8effd80
--- /dev/null
+++ b/inventory/migrations/0002_auto_20201021_2157.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.1.2 on 2020-10-21 19:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('inventory', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='game',
+            name='image',
+            field=models.ImageField(blank=True, upload_to='game_img/', verbose_name='image'),
+        ),
+    ]
diff --git a/mainsite/templates/403.html b/mainsite/templates/403.html
index d8ec6b4..e3618b2 100644
--- a/mainsite/templates/403.html
+++ b/mainsite/templates/403.html
@@ -1,4 +1,4 @@
-{% extends "base_minimal.html" %}
+{% extends "base.html" %}
 
 {% block "content" %}
 <h1>Accès refusé</h1>
diff --git a/mainsite/templates/registration/login.html b/mainsite/templates/login.html
similarity index 100%
rename from mainsite/templates/registration/login.html
rename to mainsite/templates/login.html
diff --git a/mainsite/templates/registration/login_switch.html b/mainsite/templates/login_switch.html
similarity index 100%
rename from mainsite/templates/registration/login_switch.html
rename to mainsite/templates/login_switch.html