diff --git a/requirements.txt b/requirements.txt
index 7d7aadf..97e47ce 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 pbr>=1.6 # Apache-2.0
 Babel>=1.3 # BSD
-cliff>=1.15.0 # Apache-2.0
+cliff!=1.16.0,>=1.15.0 # Apache-2.0
 PyYAML>=3.1.0 # MIT
 python-dateutil>=2.4.2 # BSD
 six>=1.9.0 # MIT