diff --git a/requirements.txt b/requirements.txt
index 3c58e682..0e37894d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,14 +2,14 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-keystoneauth1>=2.18.0 # Apache-2.0
+keystoneauth1>=2.20.0 # Apache-2.0
 oslo.config>=3.22.0 # Apache-2.0
 oslo.context>=2.12.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.log>=3.22.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.utils>=3.20.0 # Apache-2.0
-pbr>=2.0.0 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 positional>=1.1.1 # Apache-2.0
 pycadf!=2.0.0,>=1.1.0 # Apache-2.0
 python-keystoneclient>=3.8.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 88269628..55b1c2b2 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@
 hacking<0.11,>=0.10.0
 flake8-docstrings==0.2.1.post1 # MIT
 
-coverage>=4.0 # Apache-2.0
+coverage!=4.4,>=4.0 # Apache-2.0
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
 fixtures>=3.0.0 # Apache-2.0/BSD
 mock>=2.0 # BSD