diff --git a/nicohack202002/uncloud/opennebula/migrations/0002_vm_uuid.py b/nicohack202002/uncloud/opennebula/migrations/0002_vm_uuid.py
new file mode 100644
index 0000000..595fd05
--- /dev/null
+++ b/nicohack202002/uncloud/opennebula/migrations/0002_vm_uuid.py
@@ -0,0 +1,19 @@
+# Generated by Django 3.0.3 on 2020-02-23 10:55
+
+from django.db import migrations, models
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('opennebula', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='vm',
+            name='uuid',
+            field=models.UUIDField(default=uuid.uuid4, editable=False),
+        ),
+    ]
diff --git a/nicohack202002/uncloud/opennebula/models.py b/nicohack202002/uncloud/opennebula/models.py
index babba26..0f93b78 100644
--- a/nicohack202002/uncloud/opennebula/models.py
+++ b/nicohack202002/uncloud/opennebula/models.py
@@ -1,3 +1,4 @@
+import uuid
 from django.db import models
 from django.contrib.auth import get_user_model
 
@@ -5,16 +6,20 @@ from django.contrib.postgres.fields import JSONField
 
 class VM(models.Model):
     vmid = models.IntegerField(primary_key=True)
+    uuid = models.UUIDField(default=uuid.uuid4, editable=False)
     owner = models.ForeignKey(get_user_model(), on_delete=models.CASCADE)
     data = JSONField()
 
 
+    @property
     def cores(self):
-        return self.data['TEMPLATE']['VCPU']
+        return int(self.data['TEMPLATE']['VCPU'])
 
+    @property
     def ram_in_gb(self):
         return (int(self.data['TEMPLATE']['MEMORY'])/1024.)
 
+    @property
     def disks(self):
         """
         If there is no disk then the key DISK does not exist.