diff --git a/setup.cfg b/setup.cfg
index f6ec0d8..9de611d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -31,7 +31,7 @@ oslo.config.opts =
 dogpile =
   python-memcached>=1.56 # PSF
 mongo =
-  pymongo>=3.0.2 # Apache-2.0
+  pymongo!=3.1,>=3.0.2 # Apache-2.0
 
 [pbr]
 warnerrors = true