diff --git a/test-requirements.txt b/test-requirements.txt
index 3e816e9..9e6714d 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,11 +3,13 @@
 # process, which may cause wedges in the gate later.
 
 # pep8
-hacking>=3.0,<3.1.0 # Apache-2.0
+hacking>=3.1.0,<4.0.0 # Apache-2.0
 flake8-import-order>=0.17.1 # LGPLv3
 # documentation
 doc8>=0.6.0 # Apache-2.0
 sphinx>=2.0.0,!=2.1.0 # BSD
 openstackdocstheme>=2.2.1 # Apache-2.0
+pycodestyle>=2.0.0,<2.7.0 # MIT
+
 # releasenotes
 reno>=3.1.0 # Apache-2.0