diff --git a/requirements.txt b/requirements.txt
index 0821435..de7d699 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,10 +2,10 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr<2.0,>=1.3
+pbr>=1.6 # Apache-2.0
 doc8 # Apache-2.0
-oslosphinx>=2.5.0 # Apache-2.0
-sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
-testrepository>=0.0.18
-testtools>=1.4.0
+oslosphinx>=4.7.0 # Apache-2.0
+sphinx!=1.3b1,<1.4,>=1.2.1 # BSD
+testrepository>=0.0.18 # Apache-2.0/BSD
+testtools>=1.4.0 # MIT
 yasfb>=0.5.1
diff --git a/setup.py b/setup.py
index d8080d0..782bb21 100644
--- a/setup.py
+++ b/setup.py
@@ -25,5 +25,5 @@ except ImportError:
     pass
 
 setuptools.setup(
-    setup_requires=['pbr>=1.3'],
+    setup_requires=['pbr>=1.8'],
     pbr=True)