diff --git a/test-requirements.txt b/test-requirements.txt
index 8c0d31062..7e6641347 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@ mock>=1.0
 python-subunit>=0.0.18
 testrepository>=0.0.18
 testtools>=0.9.34
-zake>=0.0.18
+zake>=0.0.20 # Apache-2.0
 # docs build jobs
 sphinx>=1.2.1,<1.3
 oslosphinx