diff --git a/requirements.txt b/requirements.txt
index 9076ed47..3638649c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 argparse
-pbr<2.0,>=1.4
+pbr<2.0,>=1.6
 Babel>=1.3
 oslo.config>=2.1.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0