diff --git a/test-requirements.txt b/test-requirements.txt
index ae79ed4f..e030ae75 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 # Hacking already pins down pep8, pyflakes and flake8
-hacking<0.13,>=0.12.0 # Apache-2.0
+hacking>=0.12.0,!=0.13.0,<0.14  # Apache-2.0
 
 coverage>=4.0 # Apache-2.0
 django-nose>=1.4.4 # BSD