diff --git a/OpenAPI/TS28541_SliceNrm.yaml b/OpenAPI/TS28541_SliceNrm.yaml
index 7e1c523fc8e701774d4043a37a39a1d433e0eef7..87c847a4108443e0e9e3bf3b88e0f183219d0e39 100755
--- a/OpenAPI/TS28541_SliceNrm.yaml
+++ b/OpenAPI/TS28541_SliceNrm.yaml
@@ -1,7 +1,7 @@
 openapi: 3.0.1
 info:
   title: Slice NRM
-  version: 17.7.0
+  version: 18.1.2
   description: >-
     OAS 3.0.1 specification of the Slice NRM
     @ 2020, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).
@@ -147,7 +147,9 @@ components:
         servAttrCom:
           $ref: '#/components/schemas/ServAttrCom'
         kPIList:
-          type: string
+          type: array
+          items:
+            type: string
     NBIoT:
       type: object
       properties: