diff --git a/requirements.txt b/requirements.txt
index b033b320..958c892a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ oslo.log>=1.8.0 # Apache-2.0
 oslo.serialization>=1.4.0 # Apache-2.0
 oslo.utils>=2.0.0 # Apache-2.0
 paramiko>=1.13.0
-pbr<2.0,>=1.4
+pbr<2.0,>=1.6
 PrettyTable<0.8,>=0.7
 PyYAML>=3.1.0
 psycopg2