diff --git a/src/components/editor/ExportBar.tsx b/src/components/editor/ExportBar.tsx
index 7149ac7..ab7aa8d 100644
--- a/src/components/editor/ExportBar.tsx
+++ b/src/components/editor/ExportBar.tsx
@@ -107,6 +107,7 @@ export function ExportBar({
   const metaTags = generateMetaTags({
     title: params.title ? String(params.title) : undefined,
     description: params.description ? String(params.description) : undefined,
+    siteName: params.siteName ? String(params.siteName) : undefined,
     imageUrl: apiUrl,
   });
 
diff --git a/tests/editor/export-bar.test.ts b/tests/editor/export-bar.test.ts
new file mode 100644
index 0000000..fd83f40
--- /dev/null
+++ b/tests/editor/export-bar.test.ts
@@ -0,0 +1,27 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { renderToString } from 'react-dom/server';
+import React from 'react';
+
+const generateMetaTags = vi.fn((_params: Record<string, unknown>) => '');
+vi.mock('@/lib/meta-tag-generator', () => ({ generateMetaTags }));
+
+const { ExportBar } = await import('@/components/editor/ExportBar');
+
+function metaTagParams(params: Record<string, unknown>) {
+  renderToString(
+    React.createElement(ExportBar, { apiUrl: '/api/og?x=1', downloadUrl: '/api/og?x=1', params, templateId: 'saas-maintenance' }),
+  );
+  return generateMetaTags.mock.calls.at(-1)![0];
+}
+
+describe('ExportBar meta tags', () => {
+  beforeEach(() => generateMetaTags.mockClear());
+
+  it('passes the Site Name so the copied tags include og:site_name', () => {
+    expect(metaTagParams({ title: 'Database upgrade', siteName: 'Acme Cloud' })).toMatchObject({ siteName: 'Acme Cloud' });
+  });
+
+  it('leaves siteName out when the Site Name is empty', () => {
+    expect(metaTagParams({ title: 'Database upgrade', siteName: '' }).siteName).toBeUndefined();
+  });
+});