diff --git a/simulator/src/simulator.rs b/simulator/src/simulator.rs
index e3ac67f..f8a1b5d 100644
--- a/simulator/src/simulator.rs
+++ b/simulator/src/simulator.rs
@@ -41,8 +41,8 @@ impl Simulator {
         let rx_buf = Arc::new(RwLock::default());
         let server = Server::new(
             &runtime,
-            8080,
-            true,
+            state.port,
+            state.lightweight,
             rx_buf.clone(),
             event_loop.create_proxy(),
         )?;
diff --git a/src/lib/UI/Simulator.svelte b/src/lib/UI/Simulator.svelte
index 29dacc4..143d532 100644
--- a/src/lib/UI/Simulator.svelte
+++ b/src/lib/UI/Simulator.svelte
@@ -33,15 +33,14 @@
       "-p",
       simulatorOptions.port.toString(),
       "-v",
-      simulatorOptions.vsync ? "true" : "false",
+      simulatorOptions.vsync.toString(),
       "-s",
       setting_file,
       "--setting_dir",
       appConfigDirPath,
+      "--lightweight",
+      simulatorOptions.lightweight.toString(),
     ];
-    if (simulatorOptions.lightweight) {
-      args.push("--lightweight");
-    }
     command = simulatorOptions.unity
       ? Command.sidecar("simulator-unity", args)
       : Command.sidecar("simulator", args);