diff --git a/engine-proto/gram-test/Engine.jl b/engine-proto/gram-test/Engine.jl
index 0a4303b..10f4b02 100644
--- a/engine-proto/gram-test/Engine.jl
+++ b/engine-proto/gram-test/Engine.jl
@@ -303,7 +303,7 @@ function realize_gram_optim(
   optimize(
     loss, loss_grad!, loss_hess!,
     reshape(guess, total_dim),
-    NewtonTrustRegion()
+    Newton()
   )
 end