diff --git a/test-requirements.txt b/test-requirements.txt
index 82a2134..3b989fe 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,8 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-hacking<0.12,>=0.11.0 # Apache-2.0
+hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+
 nose # LGPL
 nosexcover # BSD
 mock>=2.0 # BSD