diff --git a/requirements.txt b/requirements.txt
index 2566d73..4be676e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ oslo.service>=1.10.0 # Apache-2.0
 paramiko>=2.0 # LGPLv2.1+
 Paste # MIT
 PasteDeploy>=1.5.0 # MIT
-pbr>=2.0.0 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 python-cinderclient>=2.0.1 # Apache-2.0
 python-glanceclient>=2.5.0 # Apache-2.0
 python-keystoneclient>=3.8.0 # Apache-2.0