diff --git a/account/migrations/0006_auto_20150924_1530.py b/account/migrations/0006_auto_20150924_1530.py
new file mode 100644
index 00000000..29a7222e
--- /dev/null
+++ b/account/migrations/0006_auto_20150924_1530.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import utils.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('account', '0005_user_problems_status'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='problems_status',
+            field=utils.models.JsonField(default={}),
+        ),
+    ]
diff --git a/contest/migrations/0011_contestrank.py b/contest/migrations/0011_contestrank.py
new file mode 100644
index 00000000..c014d7a9
--- /dev/null
+++ b/contest/migrations/0011_contestrank.py
@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+from django.conf import settings
+import utils.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('contest', '0010_auto_20150922_1703'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ContestRank',
+            fields=[
+                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
+                ('total_submission_number', models.IntegerField(default=0)),
+                ('total_ac_number', models.IntegerField(default=0)),
+                ('total_time', models.IntegerField(default=0)),
+                ('submission_info', utils.models.JsonField(default={})),
+                ('contest', models.ForeignKey(to='contest.Contest')),
+                ('user', models.ForeignKey(to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]