diff --git a/greenmine/settings/common.py b/greenmine/settings/common.py
index 77c707fd..46ac235b 100644
--- a/greenmine/settings/common.py
+++ b/greenmine/settings/common.py
@@ -210,6 +210,7 @@ INSTALLED_APPS = [
     'south',
     'haystack',
     'reversion',
+    'guardian',
 ]
 
 WSGI_APPLICATION = 'greenmine.wsgi.application'
@@ -295,6 +296,10 @@ DATE_INPUT_FORMATS = (
     '%B %d, %Y', '%d %B %Y', '%d %B, %Y'
 )
 
+AUTHENTICATION_BACKENDS = (
+    'django.contrib.auth.backends.ModelBackend', # default
+    'guardian.backends.ObjectPermissionBackend',
+)
 
 HAYSTACK_CONNECTIONS = {
     'default': {
diff --git a/requirements.txt b/requirements.txt
index f25f5773..00dc81d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ django
 django-grappelli
 django-tastypie
 django-reversion
+django-guardian
 git+https://github.com/toastdriven/django-haystack.git@master#egg=django-haystack
 django-celery
 south