diff --git a/OpenAPI/TS28541_SliceNrm.yaml b/OpenAPI/TS28541_SliceNrm.yaml
index 75b721088b58392884fed1dde21c8cd609e62786..7e1c523fc8e701774d4043a37a39a1d433e0eef7 100755
--- a/OpenAPI/TS28541_SliceNrm.yaml
+++ b/OpenAPI/TS28541_SliceNrm.yaml
@@ -115,7 +115,9 @@ components:
         availability:
           $ref: '#/components/schemas/Support'
         periodicityList:
-          type: string
+          type: array
+          items:
+            type: integer
     XLThpt:
       type: object
       properties: