diff --git a/requirements.txt b/requirements.txt
index 1c0a7cbf2..64fd48353 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-pbr<2.0,>=1.4
+pbr<2.0,>=1.6
 Babel>=1.3
 eventlet>=0.17.4
 iso8601>=0.1.9