diff --git a/requirements.txt b/requirements.txt
index cc4a46b4..e0b3b038 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,12 +3,12 @@
 # process, which may cause wedges in the gate later.
 
 Babel>=1.3
-oslo.config>=2.1.0 # Apache-2.0
+oslo.config>=2.3.0 # Apache-2.0
 oslo.context>=0.2.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0
 oslo.serialization>=1.4.0 # Apache-2.0
 oslo.utils>=2.0.0 # Apache-2.0
-pbr<2.0,>=1.4
+pbr<2.0,>=1.6
 pycadf>=0.8.0
 python-keystoneclient>=1.6.0
 requests>=2.5.2