diff --git a/OpenAPI/TS28541_SliceNrm.yaml b/OpenAPI/TS28541_SliceNrm.yaml
index 52620a6bfd9c6e9aab0fd9f3b17bb514fc53f9bb..6c2acc886b6b75c90301512dafa5913a8d25e4ac 100755
--- a/OpenAPI/TS28541_SliceNrm.yaml
+++ b/OpenAPI/TS28541_SliceNrm.yaml
@@ -333,6 +333,13 @@ components:
           enum:
             - YES
             - NO
+    SliceLifetime:
+      type: object
+      properties:
+        startTime:
+          type: string
+        endTime:
+          type: string
     DataNetworkAccess:
       type: object
       properties:
@@ -648,6 +655,10 @@ components:
             $ref: '#/components/schemas/DataNetwork'
           dataNetworkAccess:
             $ref: '#/components/schemas/DataNetworkAccess'
+          sliceLifetime:
+            type: array
+            items:
+              $ref: '#/components/schemas/SliceLifetime'
 
     SliceProfile:
       type: object