diff --git a/test-requirements.txt b/test-requirements.txt
index 807df062..196d93b5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,7 +9,7 @@ coverage!=4.4,>=4.0 # Apache-2.0
 mock>=2.0.0 # BSD
 fixtures>=3.0.0 # Apache-2.0/BSD
 oslosphinx>=4.7.0 # Apache-2.0
-sphinx!=1.6.6,<1.7.0,>=1.6.2 # BSD
+sphinx!=1.6.6,>=1.6.2 # BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 os-api-ref>=1.4.0 # Apache-2.0