diff --git a/requirements.txt b/requirements.txt
index 4642688..38cfb48 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,13 +2,13 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=1.8 # Apache-2.0
+pbr>=2.0.0 # Apache-2.0
 Babel>=2.3.4 # BSD
-cryptography!=1.3.0,>=1.0 # BSD/Apache-2.0
+cryptography>=1.6 # BSD/Apache-2.0
 python-barbicanclient>=4.0.0 # Apache-2.0
 oslo.config!=3.18.0,>=3.14.0 # Apache-2.0
 oslo.context>=2.12.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.log>=3.11.0 # Apache-2.0
-oslo.utils>=3.18.0 # Apache-2.0
+oslo.utils>=3.20.0 # Apache-2.0
 keystoneauth1>=2.18.0 # Apache-2.0
diff --git a/setup.py b/setup.py
index 782bb21..566d844 100644
--- a/setup.py
+++ b/setup.py
@@ -25,5 +25,5 @@ except ImportError:
     pass
 
 setuptools.setup(
-    setup_requires=['pbr>=1.8'],
+    setup_requires=['pbr>=2.0.0'],
     pbr=True)