diff --git a/requirements.txt b/requirements.txt
index cb321ab8..eadd8d2a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,10 +7,10 @@ oslo.config>=2.3.0 # Apache-2.0
 oslo.context>=0.2.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0
 oslo.serialization>=1.4.0 # Apache-2.0
-oslo.utils>=2.0.0 # Apache-2.0
+oslo.utils!=2.6.0,>=2.0.0 # Apache-2.0
 pbr>=1.6
 pycadf>=1.1.0
-python-keystoneclient>=1.6.0
+python-keystoneclient!=1.8.0,>=1.6.0
 requests!=2.8.0,>=2.5.2
 six>=1.9.0
 WebOb>=1.2.3