diff --git a/server/Program.cs b/server/Program.cs
index ce64acc..4d54f75 100644
--- a/server/Program.cs
+++ b/server/Program.cs
@@ -222,7 +222,7 @@ app.MapPatch("/api/orders/{orderId}/status", async (string orderId, UpdateOrderS
     .Set(order => order.Status, request.Status)
     .Set(order => order.UpdatedAt, DateTime.UtcNow);
 
-  var options = new FindOneAndUpdateOptions<OrderDocument>
+  var options = new FindOneAndUpdateOptions<OrderDocument, OrderDocument>
   {
     ReturnDocument = ReturnDocument.After
   };