diff --git a/requirements.txt b/requirements.txt
index 5344b03e..063034e7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,5 +7,5 @@ Babel>=1.3
 oslo.i18n>=1.5.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.utils!=2.6.0,>=2.4.0 # Apache-2.0
-os-client-config>=1.4.0,!=1.6.2
-PrettyTable>=0.7,<0.8
+os-client-config!=1.6.2,>=1.4.0
+PrettyTable<0.8,>=0.7