diff --git a/OpenAPI/TS28538_EdgeNrm.yaml b/OpenAPI/TS28538_EdgeNrm.yaml
index d4ac66e350066ec0df834f5140ab910c74000638..71eebf1f6b26a14d2a376ef2df0beb41921ff0ce 100644
--- a/OpenAPI/TS28538_EdgeNrm.yaml
+++ b/OpenAPI/TS28538_EdgeNrm.yaml
@@ -445,7 +445,7 @@ components:
           properties:
             federationID:
               type: string
-            FederationExpiry:
+            federationExpiry:
               $ref: 'TS28623_ComDefs.yaml#/components/schemas/DateTime'
             leadingOPiD:
               type: string