diff --git a/apps/school/migrations/0016_auto_20180429_0818.py b/apps/school/migrations/0016_auto_20180429_0818.py
new file mode 100644
index 00000000..95d050c1
--- /dev/null
+++ b/apps/school/migrations/0016_auto_20180429_0818.py
@@ -0,0 +1,19 @@
+# Generated by Django 2.0.4 on 2018-04-29 05:18
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('school', '0015_auto_20180424_1825'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='livelesson',
+            name='date',
+            field=models.DateField(default=django.utils.timezone.now, unique=True),
+        ),
+    ]
diff --git a/apps/school/models.py b/apps/school/models.py
index 4ca57fe2..faf6eaf0 100644
--- a/apps/school/models.py
+++ b/apps/school/models.py
@@ -94,7 +94,7 @@ class LiveLesson(BaseModel, DeactivatedMixin):
     title = models.CharField('Название урока', max_length=100)
     short_description = models.TextField('Краткое описание урока')
     stream = models.URLField('Ссылка на VIMEO', default='', blank=True)
-    date = models.DateField(default=now)
+    date = models.DateField(default=now, unique=True)
     cover = models.ForeignKey(
         ImageObject,
         related_name='livelesson_covers',