diff --git a/OpenAPI/TS28541_SliceNrm.yaml b/OpenAPI/TS28541_SliceNrm.yaml
index 602eab18db0b67f5964b2e950cf156e29d570857..ed9f5e4eaea0b2e05060cc45c704dd380f5d2910 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: