diff --git a/requirements.txt b/requirements.txt
index 7c01b7cd79..4b0a972683 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ pbr>=1.6 # Apache-2.0
 six>=1.9.0 # MIT
 
 Babel>=1.3 # BSD
-cliff!=1.16.0,>=1.15.0 # Apache-2.0
+cliff!=1.16.0,!=1.17.0,>=1.15.0 # Apache-2.0
 keystoneauth1>=2.1.0 # Apache-2.0
 openstacksdk>=0.7.4 # Apache-2.0
 os-client-config>=1.13.1 # Apache-2.0