diff --git a/requirements.txt b/requirements.txt
index b039f76..1e18f59 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pbr!=2.1.0,>=2.0.0 # Apache-2.0
+pbr>=2.0.0 # Apache-2.0
 
 pystache>=0.5.4 # MIT
 PyYAML>=3.12 # MIT
diff --git a/test-requirements.txt b/test-requirements.txt
index fa85bc0..5d6cc6f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,9 +1,9 @@
 hacking>=6.1.0,<6.2.0 # Apache-2.0
 
-coverage!=4.4,>=4.0 # Apache-2.0
+coverage>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 python-subunit>=1.0.0 # Apache-2.0/BSD
-sphinx>=1.6.5,!=1.6.6,!=1.6.7,!=2.1.0,!=3.0.0  # BSD
+sphinx>=1.6.5 # BSD
 stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT