diff --git a/Sources/KukaiCoreSwift/Models/RPC.swift b/Sources/KukaiCoreSwift/Models/RPC.swift
index f5daea79..e64c34c7 100644
--- a/Sources/KukaiCoreSwift/Models/RPC.swift
+++ b/Sources/KukaiCoreSwift/Models/RPC.swift
@@ -181,7 +181,8 @@ extension RPC where T == OperationResponse {
 			return nil
 		}
 		
-		return RPC<OperationResponse>(endpoint: "chains/main/blocks/head/helpers/scripts/run_operation", payload: payloadData, responseType: OperationResponse.self)
+		//return RPC<OperationResponse>(endpoint: "chains/main/blocks/head/helpers/scripts/run_operation", payload: payloadData, responseType: OperationResponse.self)
+		return RPC<OperationResponse>(endpoint: "chains/main/blocks/head/helpers/scripts/simulate_operation", payload: payloadData, responseType: OperationResponse.self)
 	}
 }