diff --git a/lower-constraints.txt b/lower-constraints.txt
index 471d3bf051..23c13a2f01 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -92,7 +92,7 @@ pyOpenSSL==17.1.0
 pyparsing==2.1.0
 pyperclip==1.5.27
 pyScss==1.3.4
-python-cinderclient==3.3.0
+python-cinderclient==4.0.0
 python-dateutil==2.5.3
 python-glanceclient==2.8.0
 python-keystoneclient==3.15.0
diff --git a/requirements.txt b/requirements.txt
index 336f62fa6c..215719ad58 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ osprofiler>=2.3.0 # Apache-2.0
 Pint>=0.5 # BSD
 pymongo!=3.1,>=3.0.2 # Apache-2.0
 pyScss!=1.3.5,>=1.3.4 # MIT License
-python-cinderclient>=3.3.0 # Apache-2.0
+python-cinderclient>=4.0.0 # Apache-2.0
 python-glanceclient>=2.8.0 # Apache-2.0
 python-keystoneclient>=3.15.0 # Apache-2.0
 python-neutronclient>=6.7.0 # Apache-2.0