diff --git a/requirements.txt b/requirements.txt
index 5dfd491..1f11ade 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@
 # 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
 six>=1.9.0