diff --git a/specification/edgeorder/resource-manager/Microsoft.EdgeOrder/preview/2020-12-01-preview/edgeorder.json b/specification/edgeorder/resource-manager/Microsoft.EdgeOrder/preview/2020-12-01-preview/edgeorder.json
index a01cac9f60da..841756444d09 100644
--- a/specification/edgeorder/resource-manager/Microsoft.EdgeOrder/preview/2020-12-01-preview/edgeorder.json
+++ b/specification/edgeorder/resource-manager/Microsoft.EdgeOrder/preview/2020-12-01-preview/edgeorder.json
@@ -1968,19 +1968,23 @@
       "properties": {
         "carrierName": {
           "description": "Name of the carrier.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "carrierDisplayName": {
           "description": "Carrier Name for display purpose. Not to be used for any processing.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "trackingId": {
           "description": "TrackingId of the package",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "trackingUrl": {
           "description": "TrackingUrl of the package.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         }
       }
     },
@@ -3053,23 +3057,28 @@
       "properties": {
         "sasKeyForLabel": {
           "description": "SAS key to download the reverse shipment label of the package.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "carrierName": {
           "description": "Name of the carrier.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "carrierDisplayName": {
           "description": "Carrier Name for display purpose. Not to be used for any processing.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "trackingId": {
           "description": "TrackingId of the package",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "trackingUrl": {
           "description": "TrackingUrl of the package.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         }
       }
     },