diff --git a/OpenAPI/sliceNrm.yaml b/OpenAPI/sliceNrm.yaml
index bf6b4d71c1a2d3f38ac3ed465f4c096b5d946b1a..67bfbe5a608b88c08ad50bacb2dfc44bff15d450 100644
--- a/OpenAPI/sliceNrm.yaml
+++ b/OpenAPI/sliceNrm.yaml
@@ -581,6 +581,12 @@ components:
                       $ref: 'genericNrm.yaml#/components/schemas/DnList'
                     priorityLabel:
                       type: integer
+                    networkSliceSubnetType:
+                      type: string
+                      enum:
+                        - TOP_SLICESUBNET
+                        - RAN_SLICESUBNET
+                        - CN_SLICESUBNET
 
     EP_Transport-Single:
       allOf: