diff --git a/models/ShipyardShip.json b/models/ShipyardShip.json
index 4f868a8..21adc34 100644
--- a/models/ShipyardShip.json
+++ b/models/ShipyardShip.json
@@ -14,7 +14,7 @@
     "supply": {
       "$ref": "./SupplyLevel.json"
     },
-    "production": {
+    "activity": {
       "$ref": "./ActivityLevel.json"
     },
     "purchasePrice": {