diff --git a/requirements.txt b/requirements.txt
index ca6a30c..a710d6f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,12 +8,12 @@ Babel>=1.3
 cliff>=1.14.0 # Apache-2.0
 keystoneauth1>=1.0.0
 os-client-config!=1.6.2,>=1.4.0
-oslo.config>=2.3.0 # Apache-2.0
+oslo.config>=2.6.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0
-oslo.utils>=2.4.0 # Apache-2.0
+oslo.utils!=2.6.0,>=2.4.0 # Apache-2.0
 python-glanceclient>=0.18.0
 python-keystoneclient!=1.8.0,>=1.6.0
-python-novaclient>=2.29.0
+python-novaclient!=2.33.0,>=2.29.0
 python-cinderclient>=1.3.1
 python-neutronclient>=2.6.0
 requests!=2.8.0,>=2.5.2