diff --git a/simulator/src/state/mod.rs b/simulator/src/state/mod.rs
index d5be92f..ab40152 100644
--- a/simulator/src/state/mod.rs
+++ b/simulator/src/state/mod.rs
@@ -72,7 +72,6 @@ pub struct State {
     pub time_scale: f32,
     pub port: u16,
     pub lightweight: bool,
-    pub lightweight_port: u16,
     pub vsync: bool,
     pub settings_dir: String,
     pub time_step: i32,
@@ -108,7 +107,6 @@ impl std::default::Default for State {
             time_scale: 1.0,
             port: 8080,
             lightweight: false,
-            lightweight_port: 8081,
             vsync: true,
             settings_dir: String::new(),
             time_step: 1000000,
@@ -145,7 +143,6 @@ impl State {
         self.time_scale = state.time_scale;
         self.port = state.port;
         self.lightweight = state.lightweight;
-        self.lightweight_port = state.lightweight_port;
         self.vsync = state.vsync;
         self.settings_dir = state.settings_dir;
         self.debug = state.debug;
diff --git a/src-tauri/src/options.rs b/src-tauri/src/options.rs
index 1faa2ff..82893f0 100644
--- a/src-tauri/src/options.rs
+++ b/src-tauri/src/options.rs
@@ -66,7 +66,6 @@ pub struct SimulatorOptions {
     pub window_height: u32,
     pub unity: bool,
     pub lightweight: bool,
-    pub lightweight_port: u16,
 }
 
 impl Default for SimulatorOptions {
@@ -78,7 +77,6 @@ impl Default for SimulatorOptions {
             window_height: 600,
             unity: false,
             lightweight: false,
-            lightweight_port: 8081,
         }
     }
 }
diff --git a/src/lib/UI/Simulator.svelte b/src/lib/UI/Simulator.svelte
index b862eb9..29dacc4 100644
--- a/src/lib/UI/Simulator.svelte
+++ b/src/lib/UI/Simulator.svelte
@@ -41,8 +41,6 @@
     ];
     if (simulatorOptions.lightweight) {
       args.push("--lightweight");
-      args.push("--lightweight_port");
-      args.push(simulatorOptions.lightweight_port.toString());
     }
     command = simulatorOptions.unity
       ? Command.sidecar("simulator-unity", args)
@@ -111,17 +109,6 @@
   <label for="lightweight">Lightweight mode:</label>
   <CheckBox id="lightweight" bind:checked={simulatorOptions.lightweight} />
 
-  {#if simulatorOptions.lightweight}
-    <label for="lightweight_port">Lightweight port:</label>
-    <NumberInput
-      id="lightweight_port"
-      bind:value={simulatorOptions.lightweight_port}
-      min="0"
-      max="65535"
-      step="1"
-    />
-  {/if}
-
   <Button label="Run" click={handleRunClick} disabled={!!child} />
   <Button label="Close" click={handleCloseClick} disabled={!child} />
 </div>
diff --git a/src/lib/UI/options.ts b/src/lib/UI/options.ts
index 4dd7d42..5a42e08 100644
--- a/src/lib/UI/options.ts
+++ b/src/lib/UI/options.ts
@@ -36,7 +36,6 @@ export interface SimulatorOptions {
     window_height: number;
     unity: boolean;
     lightweight: boolean;
-    lightweight_port: number;
 }
 
 export interface Options {