diff --git a/src/desktop/main/dashboard-compat.ts b/src/desktop/main/dashboard-compat.ts
index 5dd537a12..92fde1698 100644
--- a/src/desktop/main/dashboard-compat.ts
+++ b/src/desktop/main/dashboard-compat.ts
@@ -1,6 +1,6 @@
 import type { DashboardLocateResult } from '../shared/types.js';
 
-const supportedDashboardProtocolVersion = 1;
+const supportedDashboardProtocolVersion = 2;
 const defaultCompatTimeoutMs = 3000;
 const cliUpgradeHint = '请升级或切换全局 botmux CLI 后重启运行时；源码开发可执行 pnpm switch:here && botmux restart。也可以先在外部浏览器打开控制台。';
 
diff --git a/test/desktop/desktop-dashboard-compat.test.ts b/test/desktop/desktop-dashboard-compat.test.ts
index 84e78cd27..3caf9d3ff 100644
--- a/test/desktop/desktop-dashboard-compat.test.ts
+++ b/test/desktop/desktop-dashboard-compat.test.ts
@@ -1,6 +1,18 @@
 import { describe, expect, it, vi } from 'vitest';
 
 describe('desktop dashboard compat validation', () => {
+  it('accepts the current runtime compat manifest', async () => {
+    const { buildCompatManifest } = await import('../../src/dashboard/compat.js');
+    const { validateDashboardCompat } = await import('../../src/desktop/main/dashboard-compat.js');
+    const fetch = vi.fn().mockResolvedValue(response(200, buildCompatManifest({
+      runtimeVersion: '3.6.0',
+      machineId: null,
+    })));
+
+    await expect(validateDashboardCompat('http://127.0.0.1:7891/', { fetch }))
+      .resolves.toEqual({ ok: true });
+  });
+
   it('accepts the supported desktop compat manifest', async () => {
     const { validateDashboardCompat } = await import('../../src/desktop/main/dashboard-compat.js');
     const fetch = vi.fn().mockResolvedValue(response(200, {
@@ -92,7 +104,7 @@ describe('desktop dashboard compat validation', () => {
       schemaVersion: 1,
       product: 'botmux',
       runtimeVersion: '3.0.0',
-      dashboardProtocolVersion: 2,
+      dashboardProtocolVersion: 3,
       desktopShell: { supported: true },
       features: ['desktop-shell'],
       routes: ['#/'],