diff --git a/requirements.txt b/requirements.txt
index da8602231..6dfebf7dc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,4 +42,4 @@ cryptography!=2.0,>=1.6 # BSD/Apache-2.0
 paramiko>=2.0 # LGPLv2.1+
 pyroute2>=0.4.17 # Apache-2.0 (+ dual licensed GPL2)
 python-mistralclient>=3.1.0 # 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
diff --git a/test-requirements.txt b/test-requirements.txt
index d6d1f4420..38e1cd091 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -20,7 +20,7 @@ os-api-ref>=1.0.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 WebTest>=2.0 # MIT
-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
 
 # releasenotes
 reno!=2.3.1,>=1.8.0 # Apache-2.0