diff --git a/setup.py b/setup.py
index 79a0f59ef..b5e929c39 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@ def read(fname):
         'Django>=1.5',
         'easy-thumbnails>=1.0',
         'django-mptt>=0.6',
-        'django_polymorphic>=0.7',
+        'django_polymorphic>=0.7,<0.8',
         'Unidecode>=0.04',
     ),
     include_package_data=True,