diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,7 @@ requirements = [
         "celery>=2.2.5",
         "babel",
         "python-dateutil>=1.5.0,<2.0.0",
+        "dulwich>=0.7.0"
     ]
 
 classifiers = ['Development Status :: 4 - Beta',