diff --git a/requirements.txt b/requirements.txt
index f1d17dc..7c53f67 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pbr>=0.5.21,<1.0
+pbr>=0.5.21,<0.6
 gear
 python-swiftclient
 python-keystoneclient