diff --git a/OpenAPI/TS28104_MdaNrm.yaml b/OpenAPI/TS28104_MdaNrm.yaml
index 4290465aa8cc9e9fda12f6f9b433b7448a648134..f9f405cde1ffc0c7de3008bc649b79764c845aa1 100644
--- a/OpenAPI/TS28104_MdaNrm.yaml
+++ b/OpenAPI/TS28104_MdaNrm.yaml
@@ -34,8 +34,9 @@ components:
         - type: object
           properties:
             areaScope:
-              $ref: 'TS28623_ComDefs.yaml#/components/schemas/GeoArea'
- 
+              type: array
+              items:
+                $ref: 'TS28623_ComDefs.yaml#/components/schemas/GeoArea' 
 
     MDAOutputPerMDAType:
       type: object
@@ -55,7 +56,9 @@ components:
         filterValue:
           type: string
         threshold:
-          $ref: '#/components/schemas/ThresholdInfo'
+          type: array
+          items:
+            $ref: '#/components/schemas/ThresholdInfo'
         analyticsPeriod:
           $ref: '#/components/schemas/AnalyticsSchedule'
         timeOut:
diff --git a/OpenAPI/TS28104_MdaReport.yaml b/OpenAPI/TS28104_MdaReport.yaml
index b57be4d1a8e53fd04bfad327601642a4218f4884..bd6bdf93d42519163221ca5d93b1302b998d885a 100644
--- a/OpenAPI/TS28104_MdaReport.yaml
+++ b/OpenAPI/TS28104_MdaReport.yaml
@@ -61,6 +61,8 @@ components:
                     mDAReportID:
                       type: string
                     mDAOutputs:
-                      $ref: '#/components/schemas/MDAOutputs'
+                      type: array
+                      items:
+                        $ref: '#/components/schemas/MDAOutputs'
                     mDARequestRef:
                       $ref: 'TS28623_ComDefs.yaml#/components/schemas/Dn'