diff --git a/install_re2o.sh b/install_re2o.sh
index d64cdb50..ff09e6d8 100755
--- a/install_re2o.sh
+++ b/install_re2o.sh
@@ -797,8 +797,8 @@ main_function() {
 
         update )
             install_requirements
-            update_django
             copy_templates_files
+            update_django
             ;;
 
         copy-templates-files )
diff --git a/preferences/migrations/0059_cotisationsoption.py b/preferences/migrations/0059_cotisationsoption.py
index 1d36bf06..9fe53203 100644
--- a/preferences/migrations/0059_cotisationsoption.py
+++ b/preferences/migrations/0059_cotisationsoption.py
@@ -1,48 +1,16 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.10.7 on 2019-01-03 19:56
 from __future__ import unicode_literals
-import os
 
 from django.db import migrations, models
 import django.db.models.deletion
-from django.core.files import File
-from django.conf import settings
 import re2o.mixins
+import preferences.models
 
 
 def initialize_invoice_template(apps, schema_editor):
     CotisationsOption = apps.get_model('preferences', 'CotisationsOption')
-    DocumentTemplate = apps.get_model('cotisations', 'DocumentTemplate')
-    invoice_path = os.path.join(
-        settings.BASE_DIR,
-        "cotisations",
-        "templates",
-        "cotisations",
-        "factures.tex"
-    )
-    voucher_path = os.path.join(
-        settings.BASE_DIR,
-        "cotisations",
-        "templates",
-        "cotisations",
-        "voucher.tex"
-    )
-    with open(invoice_path) as f:
-        tpl_invoice, _ = DocumentTemplate.objects.get_or_create(
-            name="Re2o default invoice",
-        )
-        tpl_invoice.template.save('default_invoice.tex', File(f))
-        tpl_invoice.save()
-    with open(voucher_path) as f:
-        tpl_voucher, _ = DocumentTemplate.objects.get_or_create(
-            name="Re2o default voucher",
-        )
-        tpl_voucher.template.save('default_voucher.tex', File(f))
-        tpl_voucher.save()
-    CotisationsOption.objects.create(
-        invoice_template=tpl_invoice,
-        voucher_template=tpl_voucher,
-    )
+    CotisationsOption.objects.get_or_create()
 
 
 class Migration(migrations.Migration):
@@ -57,8 +25,8 @@ class Migration(migrations.Migration):
             name='CotisationsOption',
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('invoice_template', models.OneToOneField(on_delete=django.db.models.deletion.PROTECT, related_name='invoice_template', to='cotisations.DocumentTemplate', verbose_name='Template for invoices')),
-                ('voucher_template', models.OneToOneField(on_delete=django.db.models.deletion.PROTECT, related_name='voucher_template', to='cotisations.DocumentTemplate', verbose_name='Template for subscription voucher')),
+                ('invoice_template', models.OneToOneField(default=preferences.models.default_invoice,on_delete=django.db.models.deletion.PROTECT, related_name='invoice_template', to='cotisations.DocumentTemplate', verbose_name='Template for invoices')),
+                ('voucher_template', models.OneToOneField(default=preferences.models.default_voucher, on_delete=django.db.models.deletion.PROTECT, related_name='voucher_template', to='cotisations.DocumentTemplate', verbose_name='Template for subscription voucher')),
             ],
             options={
                 'verbose_name': 'cotisations options',
diff --git a/preferences/models.py b/preferences/models.py
index f03a6719..71f1ffa0 100644
--- a/preferences/models.py
+++ b/preferences/models.py
@@ -35,6 +35,7 @@ from django.forms import ValidationError
 from django.utils.translation import ugettext_lazy as _
 
 import machines.models
+import cotisations.models
 
 from re2o.mixins import AclMixin
 from re2o.aes_field import AESEncryptedField
@@ -694,6 +695,22 @@ class RadiusOption(AclMixin, PreferencesModel):
     )
 
 
+def default_invoice():
+    tpl, _ = cotisations.models.DocumentTemplate.objects.get_or_create(
+        name="Re2o default invoice",
+        template="templates/default_invoice.tex"
+    )
+    return tpl.id
+
+
+def default_voucher():
+    tpl, _ = cotisations.models.DocumentTemplate.objects.get_or_create(
+        name="Re2o default voucher",
+        template="templates/default_voucher.tex"
+    )
+    return tpl.id
+
+
 class CotisationsOption(AclMixin, PreferencesModel):
     class Meta:
         verbose_name = _("cotisations options")
@@ -703,10 +720,12 @@ class CotisationsOption(AclMixin, PreferencesModel):
         verbose_name=_("Template for invoices"),
         related_name="invoice_template",
         on_delete=models.PROTECT,
+        default=default_invoice,
     )
     voucher_template = models.OneToOneField(
         'cotisations.DocumentTemplate',
         verbose_name=_("Template for subscription voucher"),
         related_name="voucher_template",
         on_delete=models.PROTECT,
+        default=default_voucher,
     )