diff --git a/requirements.txt b/requirements.txt
index dc62f756..06e482f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ oslo.serialization>=1.4.0 # Apache-2.0
 oslo.utils!=2.6.0,>=2.0.0 # Apache-2.0
 iso8601>=0.1.9
 requests!=2.8.0,>=2.5.2
-python-keystoneclient>=1.6.0
+python-keystoneclient!=1.8.0,>=1.6.0
 PyYAML>=3.1.0
 stevedore>=1.5.0 # Apache-2.0
 six>=1.9.0