diff --git a/beat/web/attestations/migrations/0001_initial.py b/beat/web/attestations/migrations/0001_initial.py
index 391cb49a94f5d526f8b1a68d0ac01b2528b4df47..32e065cff02fa10af4ff56212c86204278309c67 100644
--- a/beat/web/attestations/migrations/0001_initial.py
+++ b/beat/web/attestations/migrations/0001_initial.py
@@ -27,32 +27,71 @@
 
 from __future__ import unicode_literals
 
-from django.db import migrations, models
+from django.db import migrations
+from django.db import models
 
 
 class Migration(migrations.Migration):
 
     dependencies = [
-        ('dataformats', '0001_initial'),
-        ('algorithms', '0001_initial'),
-        ('toolchains', '0001_initial'),
-        ('experiments', '0001_initial'),
+        ("dataformats", "0001_initial"),
+        ("algorithms", "0001_initial"),
+        ("toolchains", "0001_initial"),
+        ("experiments", "0001_initial"),
     ]
 
     operations = [
         migrations.CreateModel(
-            name='Attestation',
+            name="Attestation",
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('number', models.IntegerField()),
-                ('locked', models.BooleanField(default=True)),
-                ('creation_date', models.DateTimeField()),
-                ('publication_date', models.DateTimeField(null=True, blank=True)),
-                ('expiration_date', models.DateTimeField(null=True, blank=True)),
-                ('algorithms', models.ManyToManyField(related_name='attestations', to='algorithms.Algorithm', blank=True)),
-                ('dataformats', models.ManyToManyField(related_name='attestations', to='dataformats.DataFormat', blank=True)),
-                ('experiment', models.OneToOneField(related_name='attestation', to='experiments.Experiment', on_delete=models.CASCADE)),
-                ('toolchain', models.ForeignKey(related_name='attestations', blank=True, to='toolchains.Toolchain', null=True, on_delete=models.SET_NULL)),
+                (
+                    "id",
+                    models.AutoField(
+                        verbose_name="ID",
+                        serialize=False,
+                        auto_created=True,
+                        primary_key=True,
+                    ),
+                ),
+                ("number", models.IntegerField()),
+                ("locked", models.BooleanField(default=True)),
+                ("creation_date", models.DateTimeField()),
+                ("publication_date", models.DateTimeField(null=True, blank=True)),
+                ("expiration_date", models.DateTimeField(null=True, blank=True)),
+                (
+                    "algorithms",
+                    models.ManyToManyField(
+                        related_name="attestations",
+                        to="algorithms.Algorithm",
+                        blank=True,
+                    ),
+                ),
+                (
+                    "dataformats",
+                    models.ManyToManyField(
+                        related_name="attestations",
+                        to="dataformats.DataFormat",
+                        blank=True,
+                    ),
+                ),
+                (
+                    "experiment",
+                    models.OneToOneField(
+                        related_name="attestation",
+                        to="experiments.Experiment",
+                        on_delete=models.CASCADE,
+                    ),
+                ),
+                (
+                    "toolchain",
+                    models.ForeignKey(
+                        related_name="attestations",
+                        blank=True,
+                        to="toolchains.Toolchain",
+                        null=True,
+                        on_delete=models.SET_NULL,
+                    ),
+                ),
             ],
         ),
     ]