diff --git a/requirements.txt b/requirements.txt
index 9dc6254..144a2aa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 openstackdocstheme
-sphinx>=2.0.0
+sphinx!=2.1.0,>=2.0.0
 stestr>2.0.0 # Apache-2.0
 testtools>=0.9.34
 yasfb>=0.8.0