diff --git a/test-requirements.txt b/test-requirements.txt
index 47029efbd..f5c1f0473 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,7 +4,7 @@
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0
 flake8-import-order>=0.13 # LGPLv3
-hacking>=1.0.0 # Apache-2.0
+hacking>=1.0.0,<1.1.0 # Apache-2.0
 mock>=2.0.0 # BSD
 sphinx!=1.6.6,>=1.6.2 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0