diff --git a/test-requirements.txt b/test-requirements.txt
index 138ad35..d5ab6d0 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,8 +2,10 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=3.0.1,<3.1.0 # Apache-2.0
+hacking>=3.1.0,<4.0.0 # Apache-2.0
 
 stestr>=1.0.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 flake8-import-order>=0.17.1 # LGPLv3
+pycodestyle>=2.0.0,<2.7.0 # MIT
+