1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 1fa446d66..bd564415b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -37,7 +37,7 @@ commands = {toxinidir}/tools/states_to_dot.py -f {toxinidir}/doc/source/images/s
 [testenv:pep8]
 usedevelop = False
 deps=
-    hacking>=4.1.0,<5.0.0 # Apache-2.0
+    hacking~=6.0.0 # Apache-2.0
     doc8>=0.6.0 # Apache-2.0
     pycodestyle>=2.0.0,<3.0.0 # MIT
     flake8-import-order>=0.17.1 # LGPLv3