diff --git a/requirements.txt b/requirements.txt
index 32f079cf..c7530e66 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,4 +15,4 @@ oslo.utils>=3.20.0 # Apache-2.0
 oslo.i18n!=3.15.2,>=2.1.0 # Apache-2.0
 
 eventlet!=0.18.3,!=0.20.1,<0.21.0,>=0.18.2 # MIT
-python-barbicanclient>=4.0.0 # Apache-2.0
+python-barbicanclient!=4.5.0,>=4.0.0 # Apache-2.0