diff --git a/src/models/NSInstanceModel.ts b/src/models/NSInstanceModel.ts
index ffa95a2..569e1ac 100644
--- a/src/models/NSInstanceModel.ts
+++ b/src/models/NSInstanceModel.ts
@@ -168,7 +168,8 @@
     lcmOperationType: string;
     updateType: string;
     nsInstanceId: string;
-    changeVnfPackageData: CHANGEVNFDATA;
+    changeVnfPackageData?: CHANGEVNFDATA;
+    verticalScaleVnf?: VERTICALSCALEDATA;
 }
 
 /** Interface for changeVnfPackageData in Ns Update */
@@ -177,6 +178,13 @@
     vnfInstanceId: string;
 }
 
+/** Interface for vertical scaling */
+export interface VERTICALSCALEDATA {
+    vnfdId: string;
+    vnfInstanceId: string;
+    vduId: string;
+    countIndex: number;
+}
 /** Interface for terminate vnf in Ns Update */
 export interface TERMINATEVNF {
     lcmOperationType: string;
diff --git a/src/models/VNFInstanceModel.ts b/src/models/VNFInstanceModel.ts
index 4fd63db..c40d81c 100644
--- a/src/models/VNFInstanceModel.ts
+++ b/src/models/VNFInstanceModel.ts
@@ -85,3 +85,8 @@
     VNFInstanceId?: string;
     VNFD?: string;
 }
+
+/** Interface for VDU Details */
+export interface VDUDETAIL {
+    VDU?: string;
+}