diff --git a/test-requirements.txt b/test-requirements.txt
index 6323f28..491d0a9 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,5 +8,5 @@ testtools>=1.4.0 # MIT
 ddt>=1.0.1 # MIT
 mock>=2.0 # BSD
 
-sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
+sphinx>=1.5.1 # BSD
 oslosphinx>=4.7.0 # Apache-2.0