diff --git a/requirements.txt b/requirements.txt
index b48f2286f..419d4992f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ oslo.serialization>=1.10.0 # Apache-2.0
 oslo.service>=1.10.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
 paramiko>=2.0 # LGPLv2.1+
-pbr>=2.0.0 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 pecan!=1.0.2,!=1.0.3,!=1.0.4,!=1.2,>=1.0.0 # BSD
 python-barbicanclient>=4.0.0 # Apache-2.0
 python-ceilometerclient>=2.5.0 # Apache-2.0