diff --git a/global-requirements.txt b/global-requirements.txt
index 2cfcfc2746..a04f26b86e 100644
--- a/global-requirements.txt
+++ b/global-requirements.txt
@@ -353,7 +353,7 @@ os-apply-config  # Apache-2.0
 os-brick!=2.8.0  # Apache-2.0
 os-client-config  # Apache-2.0
 os-collect-config  # Apache-2.0
-os-ken  # Apache-2.0
+os-ken!=2.11.0,!=2.11.1  # Apache-2.0
 os-refresh-config  # Apache-2.0
 os-resource-classes  # Apache-2.0
 os-service-types  # Apache-2.0
diff --git a/upper-constraints.txt b/upper-constraints.txt
index 617c02a4b9..28cc686c03 100644
--- a/upper-constraints.txt
+++ b/upper-constraints.txt
@@ -291,7 +291,7 @@ django-pyscss===2.0.3
 uritemplate===4.1.1
 docutils===0.21.2
 threadpoolctl===3.5.0
-os-ken===2.11.1
+os-ken===2.10.0
 ujson===5.10.0
 selenium===3.141.0
 mistral-lib===3.0.0