diff --git a/admin_interface/migrations/0021_file_extension_validator.py b/admin_interface/migrations/0021_file_extension_validator.py
new file mode 100644
index 0000000..74a14e2
--- /dev/null
+++ b/admin_interface/migrations/0021_file_extension_validator.py
@@ -0,0 +1,45 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import unicode_literals
+
+from admin_interface.compat import FileExtensionValidator
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('admin_interface', '0020_module_selected_colors'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='theme',
+            name='favicon',
+            field=models.FileField(
+                blank=True,
+                help_text='(.ico|.png|.gif - 16x16|32x32 px)',
+                upload_to='admin-interface/favicon/',
+                validators=[
+                    FileExtensionValidator(allowed_extensions=[
+                        'gif', 'ico', 'jpg', 'jpeg', 'png', 'svg'
+                    ])
+                ],
+                verbose_name='favicon'),
+        ),
+        migrations.AlterField(
+            model_name='theme',
+            name='logo',
+            field=models.FileField(
+                blank=True,
+                help_text='Leave blank to use the default Django logo',
+                upload_to='admin-interface/logo/',
+                validators=[
+                    FileExtensionValidator(allowed_extensions=[
+                        'gif', 'jpg', 'jpeg', 'png', 'svg'
+                    ])
+                ],
+                verbose_name='logo'),
+        ),
+    ]