diff --git a/requirements.txt b/requirements.txt
index 375886fb..77ccc2c0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
-cliff>=2.8.0 # Apache-2.0
+cliff!=2.9.0,>=2.8.0 # Apache-2.0
 iso8601>=0.1.11 # MIT
 netaddr>=0.7.18 # BSD
 requests>=2.14.2 # Apache-2.0