diff --git a/requirements.txt b/requirements.txt
index 8966eff3f6..2e0dc8d752 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ oslo.versionedobjects>=1.17.0 # Apache-2.0
 PasteDeploy>=1.5.0 # MIT
 pycrypto>=2.6 # Public Domain
 aodhclient>=0.7.0 # Apache-2.0
-python-barbicanclient!=4.5.0,>=4.0.0 # Apache-2.0
+python-barbicanclient!=4.5.0,!=4.5.1,>=4.0.0 # Apache-2.0
 python-ceilometerclient>=2.5.0 # Apache-2.0
 python-cinderclient>=3.1.0 # Apache-2.0
 python-designateclient>=1.5.0 # Apache-2.0