diff -uNr debian.orig/changelog debian/changelog
--- debian.orig/changelog	2018-02-27 15:21:57.000000000 +0100
+++ debian/changelog	2019-08-30 10:44:02.000000000 +0200
@@ -1,3 +1,9 @@
+django-piston3 (0.3~rc2-3ubuntu5.1) bionic; urgency=medium
+
+  * debian/patches/nonce-index.patch: Add index to Nonce model (LP: #1842043)
+
+ -- Alberto Donato <alberto.donato@canonical.com>  Fri, 30 Aug 2019 08:44:02 +0000
+
 django-piston3 (0.3~rc2-3ubuntu5) bionic; urgency=medium
 
   * d/p/receive-request-lp1750998.patch: Re-enable.
diff -uNr debian.orig/patches/nonce-index.patch debian/patches/nonce-index.patch
--- debian.orig/patches/nonce-index.patch	1970-01-01 01:00:00.000000000 +0100
+++ debian/patches/nonce-index.patch	2019-08-30 10:43:55.000000000 +0200
@@ -0,0 +1,57 @@
+Description: add a unique index to the Nonce model to speed up nonce search
+Origin: upstream, https://git.launchpad.net/django-piston3/commit/?id=8727af91727caffa8c012aad46711c880bf7b992
+Author: Alberto Donato <alberto.donato@canonical.com>
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/django-piston3/+bug/1842043
+Forwarded: non-needed
+Last-Update: 2019-08-30
+Index: django-piston3/piston/models.py
+===================================================================
+--- django-piston3.orig/piston/models.py	2019-08-30 10:26:27.772857060 +0200
++++ django-piston3/piston/models.py	2019-08-30 10:27:00.709109736 +0200
+@@ -48,6 +48,11 @@
+     def __unicode__(self):
+         return u"Nonce %s for %s" % (self.key, self.consumer_key)
+ 
++    class Meta:
++        # This is mostly useful to speed up Nonces lookups, as the table can
++        # grow quite large and full scans are expensive
++        unique_together = [['token_key', 'consumer_key', 'key']]
++
+ 
+ class Consumer(models.Model):
+     name = models.CharField(max_length=255)
+Index: django-piston3/requirements.txt
+===================================================================
+--- django-piston3.orig/requirements.txt	2019-08-30 10:25:22.900359331 +0200
++++ django-piston3/requirements.txt	2019-08-30 10:27:00.709109736 +0200
+@@ -1,3 +1,3 @@
+ six
+ python-mimeparse
+-django >= 1.6
++django < 2.0
+Index: django-piston3/tests/test_project/apps/testapp/tests.py
+===================================================================
+--- django-piston3.orig/tests/test_project/apps/testapp/tests.py	2019-08-30 10:25:22.900359331 +0200
++++ django-piston3/tests/test_project/apps/testapp/tests.py	2019-08-30 10:27:00.709109736 +0200
+@@ -309,8 +309,8 @@
+   content: bar2
+   title: foo2
+ - comments:
+-  - {content: test1}
+-  - {content: test2}
++  - content: test1
++  - content: test2
+   content: test
+   title: test
+ """
+Index: django-piston3/tox.ini
+===================================================================
+--- django-piston3.orig/tox.ini	2019-08-30 10:25:22.900359331 +0200
++++ django-piston3/tox.ini	2019-08-30 10:27:08.929172796 +0200
+@@ -1,5 +1,5 @@
+ [tox]
+-envlist = py27,py33,py34
++envlist = py27,py36
+ 
+ [testenv]
+ changedir = tests
diff -uNr debian.orig/patches/series debian/patches/series
--- debian.orig/patches/series	2018-02-27 15:21:57.000000000 +0100
+++ debian/patches/series	2019-08-30 10:43:55.000000000 +0200
@@ -2,3 +2,4 @@
 handle-django-1.7-migrations
 support-django-1.11.patch
 receive-request-lp1750998.patch
+nonce-index.patch