diff --git a/tools/pip-requires b/tools/pip-requires
index 4b2f62a8f4..8216a6fc7f 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -6,7 +6,7 @@ babel>=0.9.6
 boto>=2.4.0
 cheetah>=2.4.4
 cliff>=1.3.1
-d2to1>=0.2,<0.3
+d2to1>=0.2.10,<0.3
 django>=1.4,<1.5
 django_compressor
 django_openstack_auth>=1.0.3