diff --git a/submissions/migrations/0012_auto_20180519_1047.py b/submissions/migrations/0012_auto_20180519_1047.py
new file mode 100644
index 0000000000000000000000000000000000000000..b67c1f3d4929ec9f87d5a1bfc4ce0787adb7a63c
--- /dev/null
+++ b/submissions/migrations/0012_auto_20180519_1047.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.4 on 2018-05-19 08:47
+from __future__ import unicode_literals
+
+import comments.behaviors
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submissions', '0011_report_file_attachment'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='report',
+            name='file_attachment',
+            field=models.FileField(blank=True, null=True, upload_to='uploads/reports/%Y/%m/%d/', validators=[comments.behaviors.validate_file_extension, comments.behaviors.validate_max_file_size]),
+        ),
+    ]
diff --git a/submissions/models.py b/submissions/models.py
index cf0e13a28d73cd5ccf1eff0a2661ca6cc879c1dc..66cf2fc8e02360593861bab43ae881dbd81ebb6b 100644
--- a/submissions/models.py
+++ b/submissions/models.py
@@ -518,7 +518,7 @@ class Report(SubmissionRelatedObjectMixin, models.Model):
 
     # Attachment
     file_attachment = models.FileField(
-        upload_to='uploads/reports/%Y/%m/%d/', blank=True,
+        upload_to='uploads/reports/%Y/%m/%d/', blank=True, null=True,
         validators=[validate_file_extension, validate_max_file_size])
 
     objects = ReportQuerySet.as_manager()