diff --git a/requirements.txt b/requirements.txt
index 8d48a370e..9d76620cf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,6 @@ networkx>=1.9
 pbr>=1.9
 prometheus_client==0.23.1
 ruamel.yaml==0.18.16
-os_ken==3.1.0
+os_ken==4.0.0
 beka==0.4.2
 pytricia>=1.0.0