diff --git a/media/migrations/0038_auto_20200923_2030.py b/media/migrations/0038_auto_20200923_2030.py
new file mode 100644
index 0000000..07d7ee4
--- /dev/null
+++ b/media/migrations/0038_auto_20200923_2030.py
@@ -0,0 +1,55 @@
+# Generated by Django 2.2.12 on 2020-09-23 18:30
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('media', '0037_revue_double'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bd',
+            name='external_url',
+            field=models.URLField(blank=True, default='', verbose_name='external URL'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='bd',
+            name='subtitle',
+            field=models.CharField(blank=True, default='', max_length=255, verbose_name='subtitle'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='jeu',
+            name='comment',
+            field=models.CharField(blank=True, default='', max_length=255, verbose_name='comment'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='manga',
+            name='external_url',
+            field=models.URLField(blank=True, default='', verbose_name='external URL'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='manga',
+            name='subtitle',
+            field=models.CharField(blank=True, default='', max_length=255, verbose_name='subtitle'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='roman',
+            name='external_url',
+            field=models.URLField(blank=True, default='', verbose_name='external URL'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='roman',
+            name='subtitle',
+            field=models.CharField(blank=True, default='', max_length=255, verbose_name='subtitle'),
+            preserve_default=False,
+        ),
+    ]
diff --git a/media/models.py b/media/models.py
index d6df7ba..eb40416 100644
--- a/media/models.py
+++ b/media/models.py
@@ -48,13 +48,11 @@ class BD(models.Model):
         verbose_name=_('subtitle'),
         max_length=255,
         blank=True,
-        null=True,
     )
 
     external_url = models.URLField(
         verbose_name=_('external URL'),
         blank=True,
-        null=True,
     )
 
     side_identifier = models.CharField(
@@ -109,13 +107,11 @@ class Manga(models.Model):
         verbose_name=_('subtitle'),
         max_length=255,
         blank=True,
-        null=True,
     )
 
     external_url = models.URLField(
         verbose_name=_('external URL'),
         blank=True,
-        null=True,
     )
 
     side_identifier = models.CharField(
@@ -167,13 +163,11 @@ class Roman(models.Model):
         verbose_name=_('subtitle'),
         max_length=255,
         blank=True,
-        null=True,
     )
 
     external_url = models.URLField(
         verbose_name=_('external URL'),
         blank=True,
-        null=True,
     )
 
     side_identifier = models.CharField(
@@ -415,7 +409,6 @@ class Jeu(models.Model):
     comment = models.CharField(
         max_length=255,
         blank=True,
-        null=True,
         verbose_name=_('comment'),
     )
 
diff --git a/users/migrations/0041_auto_20200923_2030.py b/users/migrations/0041_auto_20200923_2030.py
new file mode 100644
index 0000000..e9db553
--- /dev/null
+++ b/users/migrations/0041_auto_20200923_2030.py
@@ -0,0 +1,25 @@
+# Generated by Django 2.2.12 on 2020-09-23 18:30
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('users', '0040_delete_clef'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='address',
+            field=models.CharField(blank=True, default='', max_length=255, verbose_name='address'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='user',
+            name='telephone',
+            field=models.CharField(blank=True, default='', max_length=15, verbose_name='phone number'),
+            preserve_default=False,
+        ),
+    ]
diff --git a/users/models.py b/users/models.py
index 56fd01e..acea90d 100644
--- a/users/models.py
+++ b/users/models.py
@@ -13,13 +13,11 @@ class User(AbstractUser):
     telephone = models.CharField(
         verbose_name=_('phone number'),
         max_length=15,
-        null=True,
         blank=True,
     )
     address = models.CharField(
         verbose_name=_('address'),
         max_length=255,
-        null=True,
         blank=True,
     )
     maxemprunt = models.IntegerField(