diff --git a/models/ShipyardTransaction.json b/models/ShipyardTransaction.json
index 969df36..d1be15a 100644
--- a/models/ShipyardTransaction.json
+++ b/models/ShipyardTransaction.json
@@ -6,6 +6,11 @@
       "$ref": "./WaypointSymbol.json"
     },
     "shipSymbol": {
+      "type": "string",
+      "deprecated": true,
+      "description": "The symbol of the ship that was the subject of the transaction."
+    },
+    "shipType": {
       "type": "string",
       "description": "The symbol of the ship that was the subject of the transaction."
     },
@@ -27,6 +32,7 @@
   "required": [
     "waypointSymbol",
     "shipSymbol",
+    "shipType",
     "price",
     "agentSymbol",
     "timestamp"