diff --git a/helpdesk/migrations/0027_auto_20200107_1221.py b/helpdesk/migrations/0027_auto_20200107_1221.py
new file mode 100644
index 00000000..dbd50149
--- /dev/null
+++ b/helpdesk/migrations/0027_auto_20200107_1221.py
@@ -0,0 +1,71 @@
+# Generated by Django 2.2.6 on 2020-01-07 12:21
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('helpdesk', '0026_kbitem_attachments'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='kbcategory',
+            name='queue',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='helpdesk.Queue', verbose_name='Default queue when creating a ticket after viewing this category.'),
+        ),
+        migrations.AddField(
+            model_name='kbitem',
+            name='downvoted_by',
+            field=models.ManyToManyField(related_name='downvotes', to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AddField(
+            model_name='ticket',
+            name='kbitem',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='helpdesk.KBItem', verbose_name='Knowledge base item the user was viewing when they created this ticket.'),
+        ),
+        migrations.AlterField(
+            model_name='followupattachment',
+            name='filename',
+            field=models.CharField(blank=True, max_length=1000, verbose_name='Filename'),
+        ),
+        migrations.AlterField(
+            model_name='followupattachment',
+            name='mime_type',
+            field=models.CharField(blank=True, max_length=255, verbose_name='MIME Type'),
+        ),
+        migrations.AlterField(
+            model_name='followupattachment',
+            name='size',
+            field=models.IntegerField(blank=True, help_text='Size of this file in bytes', verbose_name='Size'),
+        ),
+        migrations.AlterField(
+            model_name='kbiattachment',
+            name='filename',
+            field=models.CharField(blank=True, max_length=1000, verbose_name='Filename'),
+        ),
+        migrations.AlterField(
+            model_name='kbiattachment',
+            name='mime_type',
+            field=models.CharField(blank=True, max_length=255, verbose_name='MIME Type'),
+        ),
+        migrations.AlterField(
+            model_name='kbiattachment',
+            name='size',
+            field=models.IntegerField(blank=True, help_text='Size of this file in bytes', verbose_name='Size'),
+        ),
+        migrations.AlterField(
+            model_name='kbitem',
+            name='voted_by',
+            field=models.ManyToManyField(related_name='votes', to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AlterField(
+            model_name='queue',
+            name='enable_notifications_on_email_events',
+            field=models.BooleanField(blank=True, default=False, help_text='When an email arrives to either create a ticket or to interact with an existing discussion. Should email notifications be sent ? Note: the new_ticket_cc and updated_ticket_cc work independently of this feature', verbose_name='Notify contacts when email updates arrive'),
+        ),
+    ]
diff --git a/helpdesk/models.py b/helpdesk/models.py
index ec17b3ba..8a200e27 100644
--- a/helpdesk/models.py
+++ b/helpdesk/models.py
@@ -1243,7 +1243,14 @@ class KBItem(models.Model):
     An item within the knowledgebase. Very straightforward question/answer
     style system.
     """
-    voted_by = models.ManyToManyField(settings.AUTH_USER_MODEL)
+    voted_by = models.ManyToManyField(
+        settings.AUTH_USER_MODEL,
+        related_name='votes',
+    )
+    downvoted_by = models.ManyToManyField(
+        settings.AUTH_USER_MODEL,
+        related_name='downvotes',
+    )
     category = models.ForeignKey(
         KBCategory,
         on_delete=models.CASCADE,
diff --git a/helpdesk/views/kb.py b/helpdesk/views/kb.py
index 65283c6e..b095ae3f 100644
--- a/helpdesk/views/kb.py
+++ b/helpdesk/views/kb.py
@@ -46,12 +46,21 @@ def item(request, item):
 def vote(request, item):
     item = get_object_or_404(KBItem, pk=item)
     vote = request.GET.get('vote', None)
-    if vote in ('up', 'down'):
-        if request.user not in item.voted_by:
-
+    if vote == 'up':
+        if not item.voted_by.filter(pk=request.user.pk):
             item.votes += 1
-            if vote == 'up':
-                item.recommendations += 1
-            item.save()
-
+            item.voted_by.add(request.user.pk)
+            item.recommendations += 1
+        if item.downvoted_by.filter(pk=request.user.pk):
+            item.votes -= 1
+            item.downvoted_by.remove(request.user.pk)
+    if vote == 'down':
+        if not item.downvoted_by.filter(pk=request.user.pk):
+            item.votes += 1
+            item.downvoted_by.add(request.user.pk)
+            item.recommendations -= 1
+        if item.voted_by.filter(pk=request.user.pk):
+            item.votes -= 1
+            item.voted_by.remove(request.user.pk)
+    item.save()
     return HttpResponseRedirect(item.get_absolute_url())