diff --git a/test-requirements.txt b/test-requirements.txt
index 89be917..affc510 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 # of appearance.
 
-hacking<0.11,>=0.10.0
+hacking>=0.12.0,!=0.13.0,<0.14  # Apache-2.0
 flake8-docstrings==0.2.1.post1 # MIT
 
 coverage>=4.0 # Apache-2.0