diff --git a/tox.ini b/tox.ini
index 977cf48..2f35209 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,7 +14,7 @@ commands = nosetests []
 [testenv:py26]
 deps =
   python-ldap
-  dulwich
+  dulwich<=0.9.5
   {[base]deps}
 
 [testenv:py27]