diff --git a/atreal_openads/migrations/0001_initial.py b/atreal_openads/migrations/0001_initial.py
index 2557595..b5c6bf2 100644
--- a/atreal_openads/migrations/0001_initial.py
+++ b/atreal_openads/migrations/0001_initial.py
@@ -24,9 +24,9 @@ class Migration(migrations.Migration):
                 ('description', models.TextField(verbose_name='Description')),
                 ('slug', models.SlugField(unique=True, verbose_name='Identifier')),
                 ('myjobs', jsonfield.fields.JSONField(default={})),
-                ('collectivite', models.CharField(blank=True, default=b'', help_text='ex: Marseille, ou ex: 3', max_length=255, verbose_name='Collectivity (identifier)')),
-                ('openADS_API_key', models.CharField(default=b'', help_text='ex: ah9pGbKKHv5ToF3cPQuV', max_length=255, verbose_name='openADS API key (secret)')),
-                ('openADS_API_url', models.URLField(default=b'', help_text='ex: https://openads.your_domain.net/api/', max_length=255, verbose_name='openADS API URL')),
+                ('collectivite', models.CharField(blank=True, default='', help_text='ex: Marseille, ou ex: 3', max_length=255, verbose_name='Collectivity (identifier)')),
+                ('openADS_API_key', models.CharField(default='', help_text='ex: ah9pGbKKHv5ToF3cPQuV', max_length=255, verbose_name='openADS API key (secret)')),
+                ('openADS_API_url', models.URLField(default='', help_text='ex: https://openads.your_domain.net/api/', max_length=255, verbose_name='openADS API URL')),
                 ('users', models.ManyToManyField(blank=True, to='base.ApiUser')),
             ],
             options={
@@ -40,12 +40,12 @@ class Migration(migrations.Migration):
                 ('numero_demande', models.CharField(max_length=20)),
                 ('numero_dossier', models.CharField(max_length=20)),
                 ('type_fichier', models.CharField(max_length=10)),
-                ('file_hash', models.CharField(blank=True, default=b'', max_length=100)),
-                ('orig_filename', models.CharField(blank=True, default=b'', max_length=100)),
-                ('content_type', models.CharField(blank=True, default=b'', max_length=100)),
+                ('file_hash', models.CharField(blank=True, default='', max_length=100)),
+                ('orig_filename', models.CharField(blank=True, default='', max_length=100)),
+                ('content_type', models.CharField(blank=True, default='', max_length=100)),
                 ('upload_file', models.FileField(null=True, upload_to=atreal_openads.models.get_upload_path)),
-                ('upload_status', models.CharField(blank=True, default=b'', max_length=10)),
-                ('upload_msg', models.CharField(blank=True, default=b'', max_length=255)),
+                ('upload_status', models.CharField(blank=True, default='', max_length=10)),
+                ('upload_msg', models.CharField(blank=True, default='', max_length=255)),
                 ('last_update_datetime', models.DateTimeField(auto_now=True)),
             ],
         ),