diff --git a/.travis.yml b/.travis.yml
index 318473a6f..6e55a8fc1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@ python:
   - "2.7"
 
 env:
-  - DJANGO=1.6
+  - DJANGO=1.7
 
 install:
   - pip install -q Django==$DJANGO --use-mirrors
diff --git a/modoboa/core/fixtures/initial_users.json b/modoboa/core/fixtures/initial_users.json
deleted file mode 100644
index 0986e6fb0..000000000
--- a/modoboa/core/fixtures/initial_users.json
+++ /dev/null
@@ -1 +0,0 @@
-[{"pk": 1, "model": "core.user", "fields": {"username": "admin", "first_name": "", "last_name": "", "is_active": true, "is_superuser": true, "is_staff": false, "last_login": "2012-01-26T15:19:26+01:00", "groups": [], "user_permissions": [], "password": "{CRYPT}dTTsGDkA5ZHKg", "email": "", "date_joined": "2012-01-26T15:19:26+01:00"}},{"pk": 1, "model": "core.objectaccess", "fields": {"is_owner": true, "user": 1, "content_type": ["core", "user"], "object_id": 1}}]
\ No newline at end of file
diff --git a/modoboa/core/migrations/0002_load_initial_data.py b/modoboa/core/migrations/0002_load_initial_data.py
new file mode 100644
index 000000000..67be945f2
--- /dev/null
+++ b/modoboa/core/migrations/0002_load_initial_data.py
@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+def load_initial_data(apps, schema_editor):
+    """Load initial data."""
+    User = apps.get_model("core", "User")
+    user = User(username="admin", is_superuser=True)
+    user.set_password("password")
+    user.save()
+
+    ObjectAccess = apps.get_model("core", "ObjectAccess")
+    ObjectAccess.objects.create(user=user, content_object=user, is_owner=True)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RunPython(load_initial_data)
+    ]
diff --git a/modoboa/core/migrations/0002_delete_extension.py b/modoboa/core/migrations/0003_delete_extension.py
similarity index 86%
rename from modoboa/core/migrations/0002_delete_extension.py
rename to modoboa/core/migrations/0003_delete_extension.py
index 073ef44bb..3b4dc989e 100644
--- a/modoboa/core/migrations/0002_delete_extension.py
+++ b/modoboa/core/migrations/0003_delete_extension.py
@@ -7,7 +7,7 @@ from django.db import models, migrations
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('core', '0001_initial'),
+        ('core', '0002_load_initial_data'),
     ]
 
     operations = [
diff --git a/modoboa/extensions/admin/fixtures/initial_data.json b/modoboa/extensions/admin/fixtures/initial_data.json
deleted file mode 100644
index 9ad462996..000000000
--- a/modoboa/extensions/admin/fixtures/initial_data.json
+++ /dev/null
@@ -1 +0,0 @@
-[{"pk": 1, "model": "auth.group", "fields": {"name": "DomainAdmins", "permissions": [["add_user", "core", "user"], ["change_user", "core", "user"], ["delete_user", "core", "user"], ["view_domains", "admin", "domain"], ["add_mailbox", "admin", "mailbox"], ["change_mailbox", "admin", "mailbox"], ["delete_mailbox", "admin", "mailbox"], ["add_alias", "admin", "alias"], ["change_alias", "admin", "alias"], ["delete_alias", "admin", "alias"], ["view_mailboxes", "admin", "mailbox"], ["view_aliases", "admin", "alias"], ["view_domaliases", "admin", "domainalias"], ["add_domainalias", "admin", "domainalias"], ["change_domainalias", "admin", "domainalias"], ["delete_domainalias", "admin", "domainalias"]]}},{"pk": 2, "model": "auth.group", "fields": {"name": "SimpleUsers", "permissions": []}}]
diff --git a/modoboa/extensions/admin/migrations/0002_load_initial_data.py b/modoboa/extensions/admin/migrations/0002_load_initial_data.py
new file mode 100644
index 000000000..1f08a43c9
--- /dev/null
+++ b/modoboa/extensions/admin/migrations/0002_load_initial_data.py
@@ -0,0 +1,43 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+from modoboa.lib.migration_tools import add_permissions_to_group
+
+PERMISSIONS = [
+    ["core", "user", "add_user"],
+    ["core", "user", "change_user"],
+    ["core", "user", "delete_user"],
+    ["admin", "domain", "view_domain"],
+    ["admin", "mailbox", "add_mailbox"],
+    ["admin", "mailbox", "change_mailbox"],
+    ["admin", "mailbox", "delete_mailbox"],
+    ["admin", "alias", "add_alias"],
+    ["admin", "alias", "change_alias"],
+    ["admin", "alias", "delete_alias"],
+    ["admin", "mailbox", "view_mailboxes"],
+    ["admin", "alias", "view_aliases"],
+    ["admin", "domainalias", "view_domainaliases"],
+    ["admin", "domainalias", "add_domainalias"],
+    ["admin", "domainalias", "change_domainalias"],
+    ["admin", "domainalias", "delete_domainalias"]
+]
+
+def load_initial_data(apps, schema_editor):
+    """Load initial data."""
+    Group = apps.get_model("auth", "Group")
+    dadmins = Group.objects.create(name="DomainAdmins")
+    add_permissions_to_group(apps, dadmins, PERMISSIONS)
+    Group.objects.create(name="SimpleUsers")
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('admin', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RunPython(load_initial_data)
+    ]
diff --git a/modoboa/lib/migration_tools.py b/modoboa/lib/migration_tools.py
index 4509379d6..307acad6f 100644
--- a/modoboa/lib/migration_tools.py
+++ b/modoboa/lib/migration_tools.py
@@ -1,16 +1,18 @@
 """Additional functions available for migration scripts."""
 
 
-def add_permissions_to_group(apps, groupname, permissions):
+def add_permissions_to_group(apps, group, permissions):
     """Add the specified permissions to a django group."""
-    Group = apps.get_model("auth", "Group")
     Permission = apps.get_model("auth", "Permission")
     ContentType = apps.get_model("contenttypes", "ContentType")
 
-    grp = Group.objects.get(name=groupname)
+    if isinstance(group, basestring):
+        Group = apps.get_model("auth", "Group")
+        group = Group.objects.get(name=group)
+
     for appname, modelname, permname in permissions:
         ct = ContentType.objects.get_by_natural_key(
             appname, modelname)
-        grp.permissions.add(
+        group.permissions.add(
             Permission.objects.get(content_type=ct, codename=permname)
         )