diff --git a/tox.ini b/tox.ini
index 5e1db08..8917542 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ deps = -r{toxinidir}/requirements.txt
 commands = python setup.py testr --slowest --testr-args='{posargs}'
 
 [testenv:pep8]
-deps = hacking>=0.11,<0.12
+deps = hacking>=0.12,<0.13
 commands = flake8
 
 [testenv:venv]