diff --git a/README.md b/README.md
index fd5e840..dcf7993 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Build Status](https://travis-ci.org/iambrandontaylor/django-admin-sortable.svg?branch=master)](https://travis-ci.org/iambrandontaylor/django-admin-sortable)
 
-Current version: 2.0.19
+Current version: 2.0.20
 
 This project makes it easy to add drag-and-drop ordering to any model in
 Django admin. Inlines for a sortable model may also be made sortable,
@@ -17,11 +17,9 @@ Sorting inlines:
 ![sortable-inlines](http://res.cloudinary.com/alsoicode/image/upload/v1451237555/django-admin-sortable/sortable-inlines.jpg)
 
 ## Supported Django Versions
-If you're using Django 1.4.x, use django-admin-sortable 1.4.9 or below.
+For Django 1.5.x to 1.9.x, use version 2.0.18.
 
-For Django 1.5.x to 1.9.x, use version 2.0.18 or below.
-
-For Django 1.10.x, use the latest version. 
+For Django 1.10.x, use 2.0.19 or higher. 
 
 ### Other notes of interest regarding versions
 django-admin-sortable 1.5.2 introduced backward-incompatible changes for Django 1.4.x
@@ -108,6 +106,8 @@ class MySortableClass(SortableMixin):
         return self.title
 ```
 
+Support for models that don't use an `AutoField` for their primary key are also supported in version 2.0.20 or higher.
+
 #### Common Use Case
 A common use case is to have child objects that are sortable relative to a parent. If your parent object is also sortable, here's how you would set up your models and admin options:
 
@@ -245,7 +245,7 @@ You may also pass in additional ORM "extra_filters" as a dictionary, should you
 
 ### Adding Sorting to an existing model
 
-#### Django 1.6.x or below
+#### Django 1.5.x to 1.6.x
 If you're adding Sorting to an existing model, it is recommended that you use [django-south](http://south.areacode.com/) to create a schema migration to add the "order" field to your model. You will also need to create a data migration in order to add the appropriate values for the "order" column.
 
 Example assuming a model named "Category":
@@ -500,9 +500,8 @@ ordering on top of that just seemed a little much in my opinion.
 ### Status
 django-admin-sortable is currently used in production.
 
-### What's new in 2.0.19?
-- Dropped support for Django 1.5.x
-- Updated change_form, change_list and edit inline templates for Django 1.10 compatibility.
+### What's new in 2.0.20?
+- Support for models that use another type of field besides `AutoField` for their primary key. Thanks [@rubendura](https://github.com/rubendura).
 
 ### Future
 - Better template support for foreign keys that are self referential. If someone would like to take on rendering recursive sortables, that would be super.
diff --git a/README.rst b/README.rst
index fadf9e9..2b341bf 100644
--- a/README.rst
+++ b/README.rst
@@ -3,7 +3,7 @@ Django Admin Sortable
 
 |Build Status|
 
-Current version: 2.0.19
+Current version: 2.0.20
 
 This project makes it easy to add drag-and-drop ordering to any model in
 Django admin. Inlines for a sortable model may also be made sortable,
@@ -26,11 +26,9 @@ Sorting inlines:
 Supported Django Versions
 -------------------------
 
-If you're using Django 1.4.x, use django-admin-sortable 1.4.9 or below.
+For Django 1.5.x to 1.9.x, use version 2.0.18.
 
-For Django 1.5.x to 1.9.x, use version 2.0.18 or below.
-
-For Django 1.10.x, use the latest version.
+For Django 1.10.x, use 2.0.19 or higher.
 
 Other notes of interest regarding versions
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -139,6 +137,9 @@ Sample Model:
         def __unicode__(self):
             return self.title
 
+Support for models that don't use an ``AutoField`` for their primary key
+are also supported in version 2.0.20 or higher.
+
 Common Use Case
 ^^^^^^^^^^^^^^^
 
@@ -302,7 +303,7 @@ should you need to:
 Adding Sorting to an existing model
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Django 1.6.x or below
+Django 1.5.x to 1.6.x
 ^^^^^^^^^^^^^^^^^^^^^
 
 If you're adding Sorting to an existing model, it is recommended that
@@ -616,12 +617,12 @@ Status
 
 django-admin-sortable is currently used in production.
 
-What's new in 2.0.19?
+What's new in 2.0.20?
 ~~~~~~~~~~~~~~~~~~~~~
 
--  Dropped support for Django 1.5.x
--  Updated change\_form, change\_list and edit inline templates for
-   Django 1.10 compatibility.
+-  Support for models that use another type of field besides
+   ``AutoField`` for their primary key. Thanks
+   [@rubendura](https://github.com/rubendura).
 
 Future
 ~~~~~~
diff --git a/adminsortable/__init__.py b/adminsortable/__init__.py
index 8a227c0..488c252 100644
--- a/adminsortable/__init__.py
+++ b/adminsortable/__init__.py
@@ -1,4 +1,4 @@
-VERSION = (2, 0, 19)
+VERSION = (2, 0, 20)
 DEV_N = None