diff --git a/tox.ini b/tox.ini
index 5300d06384..1552ec777a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,7 +27,7 @@ commands =
     coverage xml -o cover/coverage.xml
 
 [testenv:pep8]
-deps = hacking>=3.0,<=3.1.0
+deps = hacking>=3.0.1,<=3.1.0
        doc8
 commands =
     flake8