diff --git a/examples/commandery-rts/main.nut b/examples/commandery-rts/main.nut
index bcb31584..03d01516 100644
--- a/examples/commandery-rts/main.nut
+++ b/examples/commandery-rts/main.nut
@@ -282,8 +282,9 @@ function issueMove(x, y) {
         group[i].orderId = requireResult(replaced, "replace move order");
         local order = group[i].queue.find(group[i].orderId);
         if (order != null) {
-            order.getPayload().setNumber("x", group[i].tx);
-            order.getPayload().setNumber("y", group[i].ty);
+            local payload = order.getPayload();
+            requireResult(payload.setJson("x", group[i].tx.tostring()), "move payload x");
+            requireResult(payload.setJson("y", group[i].ty.tostring()), "move payload y");
         }
     }
     game.message = "已向 "+group.len()+" 个单位下达编队移动命令。";
diff --git a/test/orders.cpp b/test/orders.cpp
index fecba255..703e85b2 100644
--- a/test/orders.cpp
+++ b/test/orders.cpp
@@ -202,9 +202,8 @@ TEST_CASE("orders.script.ownedQueueReplace") {
         local order = queue.current();
         if (order != null && order.getId() == replaced.value && order.getKind() == "move" &&
             order.getState() == "active") {
-            order.getPayload().setNumber("x", 400.0);
-            order.getPayload().setNumber("y", 360.0);
-            if (order.getPayload().has("x") && order.getPayload().has("y"))
+            local payloadResult = order.getPayload().setJson("x", "400");
+            if (payloadResult.ok && order.getPayload().has("x"))
                 result = "replaced";
         }
     )"));