diff --git a/ansys/api/additive/VERSION b/ansys/api/additive/VERSION
index eaa2409..44b36cb 100644
--- a/ansys/api/additive/VERSION
+++ b/ansys/api/additive/VERSION
@@ -1 +1 @@
-4.0.0-dev0
+5.0.0-dev0
diff --git a/ansys/api/additive/v0/additive_materials.proto b/ansys/api/additive/v0/additive_materials.proto
index 6167f48..e424443 100644
--- a/ansys/api/additive/v0/additive_materials.proto
+++ b/ansys/api/additive/v0/additive_materials.proto
@@ -6,7 +6,6 @@ package ansys.api.additive.v0.materials;
 option csharp_namespace = "Ansys.Api.Additive.Materials";
 
 import "ansys/api/additive/v0/additive_domain.proto";
-import "google/longrunning/operations.proto";
 import "google/protobuf/empty.proto";
 
 service MaterialsService {
@@ -18,13 +17,6 @@ service MaterialsService {
     rpc GetMaterialsList (google.protobuf.Empty) returns (GetMaterialsListResponse);
 
     rpc GetMaterial (GetMaterialRequest) returns (AdditiveMaterial);
-
-    rpc TuneMaterial (TuneMaterialRequest) returns (google.longrunning.Operation) {
-        option (google.longrunning.operation_info) = {
-			response_type: "SimulationResponse"
-			metadata_type: "OperationMetadata"
-		};
-    }
 }
 
 message AddMaterialRequest {
@@ -51,10 +43,3 @@ message GetMaterialRequest {
 message GetMaterialsListResponse {
     repeated string names = 1;
 }
-
-message TuneMaterialRequest {
-    string id = 1;
-    MaterialTuningInput input = 2;
-}
-
-
diff --git a/ansys/api/additive/v0/additive_simulation.proto b/ansys/api/additive/v0/additive_simulation.proto
index 0c322b4..bade219 100644
--- a/ansys/api/additive/v0/additive_simulation.proto
+++ b/ansys/api/additive/v0/additive_simulation.proto
@@ -37,6 +37,7 @@ message SimulationRequest {
         ThermalHistoryInput thermal_history_input = 13;
         ThermalStrainInput thermal_strain_input = 14;
         Microstructure3DInput microstructure_3d_input = 15;
+        MaterialTuningInput material_tuning_input = 16;
     }
 }