diff --git a/requirements.txt b/requirements.txt
index fbaa0693..e9ca4945 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ oslo.i18n>=1.5.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.utils>=2.8.0 # Apache-2.0
 pbr>=1.6
-pycadf>=1.1.0
+pycadf!=2.0.0,>=1.1.0
 python-keystoneclient!=1.8.0,>=1.6.0
 requests>=2.8.1
 six>=1.9.0