diff --git a/shynet/analytics/migrations/0004_auto_20210328_1514.py b/shynet/analytics/migrations/0004_auto_20210328_1514.py
new file mode 100644
index 0000000..45afe74
--- /dev/null
+++ b/shynet/analytics/migrations/0004_auto_20210328_1514.py
@@ -0,0 +1,38 @@
+# Generated by Django 3.1.7 on 2021-03-28 19:14
+
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('analytics', '0003_auto_20200502_1227'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='hit',
+            name='last_seen',
+            field=models.DateTimeField(default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='hit',
+            name='start_time',
+            field=models.DateTimeField(db_index=True, default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='session',
+            name='last_seen',
+            field=models.DateTimeField(db_index=True, default=django.utils.timezone.now),
+        ),
+        migrations.AlterField(
+            model_name='session',
+            name='start_time',
+            field=models.DateTimeField(db_index=True, default=django.utils.timezone.now),
+        ),
+        migrations.AddIndex(
+            model_name='session',
+            index=models.Index(fields=['service', '-last_seen'], name='analytics_s_service_10bb96_idx'),
+        ),
+    ]
diff --git a/shynet/analytics/models.py b/shynet/analytics/models.py
index 52391fc..b16b289 100644
--- a/shynet/analytics/models.py
+++ b/shynet/analytics/models.py
@@ -22,7 +22,7 @@ class Session(models.Model):
 
     # Time
     start_time = models.DateTimeField(default=timezone.now, db_index=True)
-    last_seen = models.DateTimeField(default=timezone.now)
+    last_seen = models.DateTimeField(default=timezone.now, db_index=True)
 
     # Core request information
     user_agent = models.TextField()
@@ -53,6 +53,7 @@ class Session(models.Model):
         ordering = ["-start_time"]
         indexes = [
             models.Index(fields=["service", "-start_time"]),
+            models.Index(fields=["service", "-last_seen"]),
             models.Index(fields=["service", "identifier"]),
         ]