diff --git a/apps/documents/models.py b/apps/documents/models.py
index 2de24cb20e..9dd08d57d7 100644
--- a/apps/documents/models.py
+++ b/apps/documents/models.py
@@ -50,7 +50,7 @@ class Document(models.Model):
     """
     Defines a single document with it's fields and properties
     """
-    document_type = models.ForeignKey(DocumentType, verbose_name=_(u'document type'), null=True, blank=True)
+    document_type = models.ForeignKey(DocumentType, verbose_name=_(u'document type'), blank=True)
     file = models.FileField(upload_to=get_filename_from_uuid, storage=STORAGE_BACKEND(), verbose_name=_(u'file'))
     uuid = models.CharField(max_length=48, default=UUID_FUNCTION(), blank=True, editable=False)
     file_mimetype = models.CharField(max_length=64, default='', editable=False)
diff --git a/requirements/development.txt b/requirements/development.txt
index c5b797c29a..9f8ba5e483 100644
--- a/requirements/development.txt
+++ b/requirements/development.txt
@@ -8,5 +8,4 @@ celery==2.2.2
 django-celery==2.2.2
 django-sentry==1.6.0
 django-taggit==0.9.3
-South==0.7.3
 django-mptt==0.4.2
diff --git a/requirements/production.txt b/requirements/production.txt
index 3caa6f52ed..3fd3f1706f 100644
--- a/requirements/production.txt
+++ b/requirements/production.txt
@@ -5,5 +5,4 @@ celery==2.2.2
 django-celery==2.2.2
 django-sentry==1.6.0
 django-taggit==0.9.3
-South==0.7.3
 django-mptt==0.4.2
diff --git a/settings.py b/settings.py
index 93d8b74ec4..dc79404274 100644
--- a/settings.py
+++ b/settings.py
@@ -144,7 +144,6 @@ INSTALLED_APPS = (
     'tags',
     'document_comments',
     'user_management',
-    'south',
     'documents',
     'grouping',
     'mptt',