diff --git a/requirements.txt b/requirements.txt
index bb867edc2..30002161d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ oslo.reports>=0.6.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=1.10.0 # Apache-2.0
 oslo.service>=1.10.0 # Apache-2.0
 oslo.utils>=3.20.0 # 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
 pyasn1!=0.2.3 # BSD
 pyasn1-modules # BSD
 pyOpenSSL>=0.14 # Apache-2.0