diff --git a/requirements.txt b/requirements.txt
index d31fbf78..2b0998f9 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
 stevedore>=1.5.0 # Apache-2.0
 six>=1.9.0