diff --git a/requires.txt b/requires.txt
--- a/requires.txt
+++ b/requires.txt
@@ -9,9 +9,9 @@ whoosh>=2.3.0,<2.4
 celery>=2.2.5,<2.3
 babel
 python-dateutil>=1.5.0,<2.0.0
-dulwich>=0.8.0,<0.9.0
+dulwich>=0.8.4,<0.9.0
 webob==1.0.8
 markdown==2.1.1
 docutils==0.8.1
 py-bcrypt
-mercurial>=2.1,<2.2
\ No newline at end of file
+mercurial>=2.1,<2.2