diff --git a/xos/tosca/custom_types/xos.m4 b/xos/tosca/custom_types/xos.m4
index 40027c9..c935eef 100644
--- a/xos/tosca/custom_types/xos.m4
+++ b/xos/tosca/custom_types/xos.m4
@@ -384,6 +384,9 @@
             xosPassword:
                 type: string
                 required: false
+            vtnAPIVersion:
+                type: string
+                required: false
 
 
     tosca.nodes.CDNService:
diff --git a/xos/tosca/custom_types/xos.yaml b/xos/tosca/custom_types/xos.yaml
index d834fa4..a7ab219 100644
--- a/xos/tosca/custom_types/xos.yaml
+++ b/xos/tosca/custom_types/xos.yaml
@@ -837,6 +837,9 @@
             xosPassword:
                 type: string
                 required: false
+            vtnAPIVersion:
+                type: string
+                required: false
 
 
     tosca.nodes.CDNService: