diff --git a/access/migrations/0003_auto_20180219_1323.py b/access/migrations/0003_auto_20180219_1323.py
new file mode 100644
index 0000000..76329da
--- /dev/null
+++ b/access/migrations/0003_auto_20180219_1323.py
@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.6 on 2018-02-19 13:23
+from __future__ import unicode_literals
+
+import django.contrib.postgres.fields
+from django.db import migrations, models
+import lms.tools
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('access', '0002_init_group'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='useractivity',
+            name='ip_list',
+            field=django.contrib.postgres.fields.ArrayField(base_field=models.GenericIPAddressField(editable=False, verbose_name='Ip адресс'), default=lms.tools.get_empty_list, size=None),
+        ),
+    ]
diff --git a/access/models/other.py b/access/models/other.py
index bdaa3bb..54681d8 100644
--- a/access/models/other.py
+++ b/access/models/other.py
@@ -3,6 +3,8 @@ from django.db import models
 from phonenumber_field.modelfields import PhoneNumberField
 from django.contrib.postgres.fields import ArrayField
 
+from lms.tools import get_empty_list
+
 
 class Invite(models.Model):
     owner = models.OneToOneField(to=settings.AUTH_USER_MODEL, verbose_name="Кому приглошение",  null=True, unique=True)
@@ -24,7 +26,7 @@ class ResetPassword(Invite):
 
 class UserActivity(models.Model):
     owner = models.OneToOneField(to=settings.AUTH_USER_MODEL)
-    ip_list = ArrayField(models.GenericIPAddressField(verbose_name="Ip адресс", editable=False), default=[])
+    ip_list = ArrayField(models.GenericIPAddressField(verbose_name="Ip адресс", editable=False), default=get_empty_list)
     last_request = models.DateTimeField(verbose_name="Был в сети", auto_now=True)
 
     def __str__(self):
diff --git a/courses/models.py b/courses/models.py
index 7d52c36..3bfd01a 100755
--- a/courses/models.py
+++ b/courses/models.py
@@ -7,7 +7,7 @@ from django.core.exceptions import ObjectDoesNotExist
 from django.db import models
 from django.template.defaultfilters import slugify
 
-from lms.tools import decode_base64, get_real_name
+from lms.tools import decode_base64, get_real_name, get_empty_list
 
 COURSE_LEVEL = (
     ('B', 'Базовый'),
@@ -35,7 +35,7 @@ class Lesson(models.Model):
     video = models.TextField(verbose_name='Код видео', blank=True, null=True)
     material_tokens = ArrayField(
         models.UUIDField(verbose_name="Токен материала", editable=False),
-        default=[],
+        default=get_empty_list,
         verbose_name='Материалы курса',
     )
     free = models.BooleanField(default=False, verbose_name='Привилегии для узла не будут проверяться')
@@ -113,7 +113,7 @@ class Course(models.Model):
     public = models.BooleanField(verbose_name='Опубликовать', default=False)
     teacher_tokens = ArrayField(
         models.UUIDField(verbose_name="Токен препода", editable=False),
-        default=[],
+        default=get_empty_list,
         verbose_name='Преподователи курса',
     )
     image = models.URLField(verbose_name='Изображение', blank=True, max_length=255)
diff --git a/lms/tools.py b/lms/tools.py
index 4a8d259..51b0807 100644
--- a/lms/tools.py
+++ b/lms/tools.py
@@ -24,6 +24,10 @@ def get_real_name(array, elem):
             return i
 
 
+def get_empty_list():
+    return []
+
+
 EXAMPLE_BASE64 = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAQAAAAEACAYAAABccqhmAAANHUlEQVR42u3dXagdd9XH8e8Kh1A" \
                  "OIYRSQwhFDiWmMTeNELQq2ChCk1rbaIO9eNIXNeJNXxSkvlRaLNQoemGqXmgs1BeQSqux0Scq0saCNpRSWiv1mJRykBJC6EUII" \
                  "bbHw1le7BFrq/XkdF7+M/P9QK6SzJ7932v99szsWXsHA5KZK4FLqz9vATYB64HVwCrgPKT/7SXgDHAaOA7MAseAI8CRiJgfyhONA" \
diff --git a/progress/migrations/0005_auto_20180219_1317.py b/progress/migrations/0005_auto_20180219_1317.py
new file mode 100644
index 0000000..c3a927b
--- /dev/null
+++ b/progress/migrations/0005_auto_20180219_1317.py
@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.6 on 2018-02-19 13:17
+from __future__ import unicode_literals
+
+import django.contrib.postgres.fields
+from django.db import migrations, models
+import progress.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('progress', '0004_progress_is_finish'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='progresslesson',
+            name='comment_tokens',
+            field=django.contrib.postgres.fields.ArrayField(base_field=models.UUIDField(editable=False, verbose_name='Токен комента'), default=progress.models.get_empty_list, size=None),
+        ),
+    ]
diff --git a/progress/models.py b/progress/models.py
index 8bf49c5..db2ecec 100644
--- a/progress/models.py
+++ b/progress/models.py
@@ -3,11 +3,13 @@ from django.contrib.postgres.fields import ArrayField
 from django.db import models
 from model_utils import Choices
 
+from lms.tools import get_empty_list
+
 
 class Progress(models.Model):
     hidden_lessons = ArrayField(
         models.UUIDField(verbose_name="Токен урока", unique=True, editable=False),
-        default=[],
+        default=get_empty_list,
         verbose_name='Список скрытых уроков',
     )
     teacher = models.ForeignKey(to=settings.AUTH_USER_MODEL, verbose_name="Преподователь по умолчанию",
@@ -55,7 +57,7 @@ class ProgressLesson(models.Model):
     finish_date = models.DateTimeField(verbose_name='Дата зачтения задания', blank=True, null=True)
     start_date = models.DateTimeField(verbose_name='Дата начала прохождения задания', auto_now_add=True)
     status = models.CharField(choices=STATUSES, default=STATUSES.start, max_length=20)
-    comment_tokens = ArrayField(models.UUIDField(verbose_name="Токен комента", editable=False), default=[])
+    comment_tokens = ArrayField(models.UUIDField(verbose_name="Токен комента", editable=False), default=get_empty_list)
 
     def __str__(self):
         return self.progress.user.email