diff --git a/requirements.txt b/requirements.txt
index ac4bb80..01fb1b9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,10 +1,10 @@
-pbr!=2.1.0,>=2.0.0 # Apache-2.0
+pbr>=2.0.0 # Apache-2.0
 
 python-keystoneclient>=3.8.0 # Apache-2.0
 python-heatclient>=1.10.0 # Apache-2.0
 python-zaqarclient>=1.0.0 # Apache-2.0
 requests>=2.14.2 # Apache-2.0
-lxml!=3.7.0,>=3.4.1 # BSD
+lxml>=3.4.1 # BSD
 oslo.config>=5.2.0 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
 dogpile.cache>=0.6.2 # BSD
diff --git a/test-requirements.txt b/test-requirements.txt
index dbca8fa..708cc42 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!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2 # BSD
+sphinx>=1.6.2 # BSD
 stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT