diff --git a/requirements.txt b/requirements.txt
index c6ae2d6..e7acccd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@
 # be installed in a specific order.
 #
 # PBR should always appear first
-pbr>=2.0.0 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 python-zaqarclient>=1.0.0 # Apache-2.0
 Babel!=2.4.0,>=2.3.4 # BSD
 Django<1.9,>=1.8 # BSD