diff --git a/requirements.txt b/requirements.txt
index a70f07d161..ee72054c81 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ six>=1.9.0
 Babel>=1.3
 cliff>=1.14.0 # Apache-2.0
 cliff-tablib>=1.0
-os-client-config>=1.4.0
+os-client-config!=1.6.2,>=1.4.0
 oslo.config>=2.1.0 # Apache-2.0
 oslo.i18n>=1.5.0 # Apache-2.0
 oslo.utils>=1.9.0 # Apache-2.0