diff --git a/requirements.txt b/requirements.txt
index 068a2f9d0..3a1437230 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-pbr>=0.5.16,<0.6
+pbr>=0.5.21,<1.0
 argparse
 PrettyTable>=0.6,<0.8
-requests>=1.1,<1.2.3
+requests>=1.1
 simplejson>=2.0.9
 six
diff --git a/setup.py b/setup.py
index 15f4e9d54..2a0786a8b 100644
--- a/setup.py
+++ b/setup.py
@@ -18,5 +18,5 @@
 import setuptools
 
 setuptools.setup(
-    setup_requires=['pbr>=0.5.20'],
+    setup_requires=['pbr>=0.5.21,<1.0'],
     pbr=True)