diff --git a/packages/void/src/cli/package.ts b/packages/void/src/cli/package.ts
index 3e5edf744..22b3a0caa 100644
--- a/packages/void/src/cli/package.ts
+++ b/packages/void/src/cli/package.ts
@@ -182,6 +182,11 @@ const ASSET_MIME_TYPES: Record<string, string> = {
   svg: 'image/svg+xml; charset=utf-8',
   txt: 'text/plain; charset=utf-8',
   csv: 'text/csv; charset=utf-8',
+  md: 'text/markdown; charset=utf-8',
+  markdown: 'text/markdown; charset=utf-8',
+  yaml: 'text/yaml; charset=utf-8',
+  yml: 'text/yaml; charset=utf-8',
+  toml: 'application/toml',
   png: 'image/png',
   jpg: 'image/jpeg',
   jpeg: 'image/jpeg',
diff --git a/packages/void/test/unit/asset-hashing.test.ts b/packages/void/test/unit/asset-hashing.test.ts
index c6ee97298..7c4fe556a 100644
--- a/packages/void/test/unit/asset-hashing.test.ts
+++ b/packages/void/test/unit/asset-hashing.test.ts
@@ -19,8 +19,13 @@ vi.mock('node:fs', async () => {
 const fsModule = await import('node:fs');
 const readFileSyncMock = fsModule.readFileSync as unknown as ReturnType<typeof vi.fn>;
 
-const { collectAndHashAssets, computeAssetHash, computeAssetHashes, computeMd5 } =
-  await import('../../src/cli/package.ts');
+const {
+  collectAndHashAssets,
+  computeAssetHash,
+  computeAssetHashes,
+  computeMd5,
+  getAssetContentType,
+} = await import('../../src/cli/package.ts');
 
 const TMP = join(import.meta.dirname, '.tmp-asset-hashing-test');
 
@@ -135,3 +140,28 @@ describe('collectAndHashAssets — v2 manifest entries', () => {
     expect(Object.keys(assetManifest).sort()).toEqual(['/a.js', '/b.css', '/c.html']);
   });
 });
+
+describe('getAssetContentType', () => {
+  it('returns text/markdown for .md files', () => {
+    expect(getAssetContentType('/guide/github-actions-cache.md')).toBe(
+      'text/markdown; charset=utf-8',
+    );
+  });
+
+  it('returns text/markdown for .markdown files', () => {
+    expect(getAssetContentType('/notes.markdown')).toBe('text/markdown; charset=utf-8');
+  });
+
+  it('returns text/yaml for .yaml and .yml files', () => {
+    expect(getAssetContentType('/config.yaml')).toBe('text/yaml; charset=utf-8');
+    expect(getAssetContentType('/config.yml')).toBe('text/yaml; charset=utf-8');
+  });
+
+  it('returns application/toml for .toml files', () => {
+    expect(getAssetContentType('/config.toml')).toBe('application/toml');
+  });
+
+  it('returns application/octet-stream for unknown extensions', () => {
+    expect(getAssetContentType('/file.xyz')).toBe('application/octet-stream');
+  });
+});