diff --git a/gym/migrations/0005_auto_20180304_1025.py b/gym/migrations/0005_auto_20180304_1025.py
new file mode 100644
index 0000000..0ccc569
--- /dev/null
+++ b/gym/migrations/0005_auto_20180304_1025.py
@@ -0,0 +1,23 @@
+# Generated by Django 2.0.2 on 2018-03-04 09:25
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gym', '0004_auto_20180303_1801'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='room',
+            name='latitude',
+            field=models.DecimalField(blank=True, decimal_places=8, max_digits=11, null=True, verbose_name='latitude'),
+        ),
+        migrations.AlterField(
+            model_name='room',
+            name='longitude',
+            field=models.DecimalField(blank=True, decimal_places=8, max_digits=11, null=True, verbose_name='longitude'),
+        ),
+    ]
diff --git a/gym/models.py b/gym/models.py
index a38d59c..2b81a6f 100644
--- a/gym/models.py
+++ b/gym/models.py
@@ -7,8 +7,8 @@ class Room(models.Model):
         verbose_name_plural = 'salles'
 
     name = models.CharField('nom', max_length=300)
-    latitude = models.DecimalField('latitude', max_digits=11, decimal_places=8, blank=True)
-    longitude = models.DecimalField('longitude', max_digits=11, decimal_places=8, blank=True)
+    latitude = models.DecimalField('latitude', max_digits=11, decimal_places=8, blank=True, null=True)
+    longitude = models.DecimalField('longitude', max_digits=11, decimal_places=8, blank=True, null=True)
     notes = models.TextField('notes', blank=True)
 
     def __str__(self):