diff --git a/aggregator/migrations/0004_auto_20190130_2321.py b/aggregator/migrations/0004_auto_20190130_2321.py
new file mode 100644
index 0000000..f5cef47
--- /dev/null
+++ b/aggregator/migrations/0004_auto_20190130_2321.py
@@ -0,0 +1,23 @@
+# Generated by Django 2.1.5 on 2019-01-30 20:21
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('aggregator', '0003_auto_20190128_0048'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='aggregationsource',
+            name='chat_id',
+            field=models.BigIntegerField(db_index=True),
+        ),
+        migrations.AlterField(
+            model_name='chat',
+            name='chat_id',
+            field=models.BigIntegerField(db_index=True),
+        ),
+    ]