diff --git a/apps/course/migrations/0011_auto_20180129_1527.py b/apps/course/migrations/0011_auto_20180129_1527.py
new file mode 100644
index 00000000..c2214936
--- /dev/null
+++ b/apps/course/migrations/0011_auto_20180129_1527.py
@@ -0,0 +1,28 @@
+# Generated by Django 2.0.1 on 2018-01-29 15:27
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('course', '0010_auto_20180129_1501'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='course',
+            name='from_author',
+            field=models.TextField(blank=True, default='', null=True, verbose_name='От автора'),
+        ),
+        migrations.AlterField(
+            model_name='course',
+            name='likes',
+            field=models.ManyToManyField(blank=True, to='course.Like'),
+        ),
+        migrations.AlterField(
+            model_name='course',
+            name='materials',
+            field=models.ManyToManyField(blank=True, to='course.Material'),
+        ),
+    ]
diff --git a/apps/course/models.py b/apps/course/models.py
index 705d3eef..f8cfab87 100644
--- a/apps/course/models.py
+++ b/apps/course/models.py
@@ -24,7 +24,7 @@ class Course(models.Model):
     author = models.ForeignKey(User, on_delete=models.SET_NULL, null=True, blank=True)
     title = models.CharField('Название курса', max_length=100)
     short_description = models.TextField('Краткое описание курса')
-    from_author = models.TextField('От автора', default='')
+    from_author = models.TextField('От автора', default='', null=True, blank=True)
     cover = models.ImageField('Фон курса', upload_to='courses')
     price = models.DecimalField('Цена курса', help_text='Если цены нету, то курс бесплатный', max_digits=10, decimal_places=2, null=True, blank=True)
     is_infinite = models.BooleanField(default=False)
@@ -34,8 +34,8 @@ class Course(models.Model):
     is_featured = models.BooleanField(default=False)
     url = models.URLField('Ссылка', default='')
     status = models.PositiveSmallIntegerField('Статус', default=0, choices=STATUS_CHOICES)
-    likes = models.ManyToManyField(Like)
-    materials = models.ManyToManyField('Material')
+    likes = models.ManyToManyField(Like, blank=True)
+    materials = models.ManyToManyField('Material', blank=True)
 
     created_at = models.DateTimeField(auto_now_add=True)
     update_at = models.DateTimeField(auto_now=True)