diff --git a/submissions/migrations/0043_auto_20170512_0836.py b/submissions/migrations/0043_auto_20170512_0836.py
new file mode 100644
index 0000000000000000000000000000000000000000..badd52ad60321186d16f52a6cb4ba9922e5cbb20
--- /dev/null
+++ b/submissions/migrations/0043_auto_20170512_0836.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.3 on 2017-05-12 06:36
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submissions', '0042_auto_20170511_2321'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='submission',
+            name='latest_activity',
+            field=models.DateTimeField(auto_now=True),
+        ),
+    ]
diff --git a/submissions/models.py b/submissions/models.py
index 787754332f0ecdd4c01c8b9685b499e84333b448..c2364962e70eeff53d55c6d22691d6e965131bb1 100644
--- a/submissions/models.py
+++ b/submissions/models.py
@@ -79,7 +79,7 @@ class Submission(ArxivCallable, models.Model):
     # Metadata
     metadata = JSONField(default={}, blank=True, null=True)
     submission_date = models.DateField(verbose_name='submission date', default=datetime.date.today)
-    latest_activity = models.DateTimeField(default=timezone.now)
+    latest_activity = models.DateTimeField(auto_now=True)
 
     objects = SubmissionManager()