diff --git a/requirements.txt b/requirements.txt
index d06d51f6..f5db4aa3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,5 +9,5 @@ python-keystoneclient!=1.8.0,>=1.6.0
 requests!=2.8.0,>=2.5.2
 warlock<2,>=1.0.1
 six>=1.9.0
-oslo.utils>=2.4.0 # Apache-2.0
+oslo.utils!=2.6.0,>=2.4.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 9af0f2aa..7f7d971a 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,7 +6,7 @@ hacking<0.11,>=0.10.0
 coverage>=3.6
 discover
 mock>=1.2
-os-client-config>=1.4.0,!=1.6.2
+os-client-config!=1.6.2,>=1.4.0
 oslosphinx>=2.5.0 # Apache-2.0
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 testrepository>=0.0.18