diff --git a/setup.cfg b/setup.cfg
index 30b02bcb6..b42dfad46 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -65,9 +65,9 @@ redis =
 workers =
   kombu!=4.0.2,>=4.0.0 # BSD
 eventlet =
-  eventlet!=0.18.3,>=0.18.2 # MIT
+  eventlet!=0.18.3,<0.21.0,>=0.18.2 # MIT
 doc =
-  sphinx>=1.5.1 # BSD
+  sphinx!=1.6.1,>=1.5.1 # BSD
   oslosphinx>=4.7.0 # Apache-2.0
 database =
   SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT