diff --git a/tox.ini b/tox.ini
index 8912959..07d825d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,10 +15,10 @@ deps =
 
 [testenv:pep8]
 deps =
-    hacking>=3.1.0,<4.0.0 # Apache-2.0
+    hacking~=6.0.0 # Apache-2.0
     flake8-import-order>=0.17.1 # LGPLv3
     doc8>=0.6.0 # Apache-2.0
-    pycodestyle>=2.0.0,<2.7.0 # MIT
+    pycodestyle>=2.0.0,<3.0.0 # MIT
 commands =
     flake8 ironic_python_agent_builder
     doc8 doc/source README.rst CONTRIBUTING.rst