diff --git a/test-requirements.txt b/test-requirements.txt
index c2df18d7e..46455ee36 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,7 +3,7 @@ docutils>=0.11,!=0.13.1  # OSI-Approved Open Source, Public Domain
 PyYAML>=3.1.0
 yamllint>=0.5.2
 requests-cache
-hacking>=3.0.1,<3.1.0 # Apache-2.0
+hacking~=6.0.0 # Apache-2.0
 whereto>=0.3.0  # Apache-2.0
 
 fixtures>=3.0.0 # Apache-2.0/BSD