diff --git a/manuels/migrations/0013_auto_20180524_0016.py b/manuels/migrations/0013_auto_20180524_0016.py
new file mode 100644
index 0000000..fe8b02f
--- /dev/null
+++ b/manuels/migrations/0013_auto_20180524_0016.py
@@ -0,0 +1,33 @@
+# Generated by Django 2.0.5 on 2018-05-23 22:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('manuels', '0012_auto_20180524_0014'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='book',
+            name='field',
+            field=models.CharField(max_length=200, verbose_name='matière'),
+        ),
+        migrations.AlterField(
+            model_name='editor',
+            name='name',
+            field=models.CharField(max_length=100, verbose_name='nom'),
+        ),
+        migrations.AlterField(
+            model_name='level',
+            name='name',
+            field=models.CharField(max_length=50, verbose_name='nom'),
+        ),
+        migrations.AlterField(
+            model_name='suppliesrequirement',
+            name='field',
+            field=models.CharField(max_length=200, verbose_name='matière'),
+        ),
+    ]
diff --git a/manuels/models.py b/manuels/models.py
index adebb8d..a557996 100644
--- a/manuels/models.py
+++ b/manuels/models.py
@@ -80,7 +80,7 @@ class Level(BaseModel):
     class Meta:
         verbose_name = 'classe'
         verbose_name_plural = 'classes'
-    name = models.CharField('nom', max_length=10)
+    name = models.CharField('nom', max_length=50)
 
     def __str__(self):
         return self.name
@@ -90,7 +90,7 @@ class Editor(BaseModel):
     class Meta:
         verbose_name = 'éditeur'
         verbose_name_plural = 'éditeurs'
-    name = models.CharField('nom', max_length=50)
+    name = models.CharField('nom', max_length=100)
 
     def __str__(self):
         return self.name
@@ -109,7 +109,7 @@ class Book(BaseModel):
 
     teacher = models.ForeignKey(verbose_name='enseignant', to=Teacher, on_delete=models.PROTECT, null=True)
     level = models.ForeignKey(verbose_name='classe', to=Level, on_delete=models.PROTECT, null=True)
-    field = models.CharField('matière', max_length=100)
+    field = models.CharField('matière', max_length=200)
     title = models.TextField('titre')
     authors = models.TextField('auteurs')
     editor = models.ForeignKey(verbose_name='éditeur', to=Editor, on_delete=models.PROTECT, null=True)
@@ -151,7 +151,7 @@ class SuppliesRequirement(BaseModel):
 
     teacher = models.ForeignKey(verbose_name='enseignant', to=Teacher, on_delete=models.PROTECT, null=True)
     level = models.ForeignKey(verbose_name='classe', to=Level, on_delete=models.PROTECT, null=True)
-    field = models.CharField('matière', max_length=100)
+    field = models.CharField('matière', max_length=200)
     supplies = models.TextField('fournitures')
 
     def __str__(self):