diff --git a/OpenAPI/TS28541_SliceNrm.yaml b/OpenAPI/TS28541_SliceNrm.yaml
index 64cb929e3198f509b681b3880094fa3538ec8af5..d5c287e33331241fad3fd8c164c1d7772c09ac4b 100644
--- a/OpenAPI/TS28541_SliceNrm.yaml
+++ b/OpenAPI/TS28541_SliceNrm.yaml
@@ -185,7 +185,9 @@ components:
         servAttrCom:
           $ref: '#/components/schemas/ServAttrCom'
         kPIList:
-          type: string
+          type: array
+          items:
+            type: string
     UserMgmtOpen:
       type: object
       properties: