1 files changed, 1 insertions, 1 deletions
diff --git a/setup.cfg b/setup.cfg
index f573137..a1cf1c4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -80,7 +80,7 @@ test =
   testtools>=2.2.0 # MIT
   testscenarios>=0.4 # Apache-2.0/BSD
   doc8>=0.6.0 # Apache-2.0
-  sphinx>=1.6.2 # BSD
+  sphinx!=1.6.6,>=1.6.2 # BSD
 
 [nosetests]
 cover-erase = true