diff --git a/packages/markdown-it/src/core.ts b/packages/markdown-it/src/core.ts
index 234a01ca3..58f7b17e2 100644
--- a/packages/markdown-it/src/core.ts
+++ b/packages/markdown-it/src/core.ts
@@ -1,5 +1,15 @@
 import type MarkdownIt from 'markdown-it'
-import type { BuiltinTheme, CodeOptionsMeta, CodeOptionsThemes, CodeToHastOptions, HighlighterGeneric, ShikiTransformer, TransformerOptions } from 'shiki'
+import type {
+  BuiltinLanguage,
+  BuiltinTheme,
+  CodeOptionsMeta,
+  CodeOptionsThemes,
+  CodeToHastOptions,
+  HighlighterGeneric,
+  LanguageInput,
+  ShikiTransformer,
+  TransformerOptions,
+} from 'shiki'
 
 export interface MarkdownItShikiExtraOptions {
   /**
@@ -21,6 +31,18 @@ export interface MarkdownItShikiExtraOptions {
    * @default true
    */
   trimEndingNewline?: boolean
+
+  /**
+   * When lang of code block is empty string, it will work.
+   *
+   * @default 'text'
+   */
+  defaultLanguage?: LanguageInput | BuiltinLanguage
+
+  /**
+   * When lang of code block is not included in langs of options, it will be as a fallback lang.
+   */
+  fallbackLanguage?: LanguageInput | BuiltinLanguage
 }
 
 export type MarkdownItShikiSetupOptions =
@@ -37,9 +59,17 @@ export function setupMarkdownIt(
   const {
     parseMetaString,
     trimEndingNewline = true,
+    defaultLanguage = 'text',
+    fallbackLanguage,
   } = options
-
+  const langs = highlighter.getLoadedLanguages()
   markdownit.options.highlight = (code, lang = 'text', attrs) => {
+    if (lang === '') {
+      lang = defaultLanguage as string
+    }
+    if (fallbackLanguage && !langs.includes(lang)) {
+      lang = fallbackLanguage as string
+    }
     const meta = parseMetaString?.(attrs, code, lang) || {}
     const codeOptions: CodeToHastOptions = {
       ...options,
diff --git a/packages/markdown-it/test/fixtures/b.md b/packages/markdown-it/test/fixtures/b.md
new file mode 100644
index 000000000..ceab8676a
--- /dev/null
+++ b/packages/markdown-it/test/fixtures/b.md
@@ -0,0 +1,3 @@
+```j
+console.log('it works!')
+```
diff --git a/packages/markdown-it/test/fixtures/b.out.html b/packages/markdown-it/test/fixtures/b.out.html
new file mode 100644
index 000000000..963989fcb
--- /dev/null
+++ b/packages/markdown-it/test/fixtures/b.out.html
@@ -0,0 +1 @@
+<pre class="shiki shiki-themes vitesse-light vitesse-dark" style="background-color:#ffffff;--shiki-dark-bg:#121212;color:#393a34;--shiki-dark:#dbd7caee" tabindex="0"><code class="language-js"><span class="line"><span style="color:#B07D48;--shiki-dark:#BD976A">console</span><span style="color:#999999;--shiki-dark:#666666">.</span><span style="color:#59873A;--shiki-dark:#80A665">log</span><span style="color:#999999;--shiki-dark:#666666">(</span><span style="color:#B5695999;--shiki-dark:#C98A7D99">'</span><span style="color:#B56959;--shiki-dark:#C98A7D">it works!</span><span style="color:#B5695999;--shiki-dark:#C98A7D99">'</span><span style="color:#999999;--shiki-dark:#666666">)</span></span></code></pre>
diff --git a/packages/markdown-it/test/fixtures/c.md b/packages/markdown-it/test/fixtures/c.md
new file mode 100644
index 000000000..52f8e2fc6
--- /dev/null
+++ b/packages/markdown-it/test/fixtures/c.md
@@ -0,0 +1,3 @@
+```
+console.log('it works!')
+```
diff --git a/packages/markdown-it/test/fixtures/c.out.html b/packages/markdown-it/test/fixtures/c.out.html
new file mode 100644
index 000000000..963989fcb
--- /dev/null
+++ b/packages/markdown-it/test/fixtures/c.out.html
@@ -0,0 +1 @@
+<pre class="shiki shiki-themes vitesse-light vitesse-dark" style="background-color:#ffffff;--shiki-dark-bg:#121212;color:#393a34;--shiki-dark:#dbd7caee" tabindex="0"><code class="language-js"><span class="line"><span style="color:#B07D48;--shiki-dark:#BD976A">console</span><span style="color:#999999;--shiki-dark:#666666">.</span><span style="color:#59873A;--shiki-dark:#80A665">log</span><span style="color:#999999;--shiki-dark:#666666">(</span><span style="color:#B5695999;--shiki-dark:#C98A7D99">'</span><span style="color:#B56959;--shiki-dark:#C98A7D">it works!</span><span style="color:#B5695999;--shiki-dark:#C98A7D99">'</span><span style="color:#999999;--shiki-dark:#666666">)</span></span></code></pre>
diff --git a/packages/markdown-it/test/index.test.ts b/packages/markdown-it/test/index.test.ts
index 08ab76725..1c0d7b382 100644
--- a/packages/markdown-it/test/index.test.ts
+++ b/packages/markdown-it/test/index.test.ts
@@ -4,7 +4,7 @@ import MarkdownIt from 'markdown-it'
 import { transformerMetaHighlight } from '@shikijs/transformers'
 import Shiki from '../src'
 
-it('run', async () => {
+it('run for base', async () => {
   const md = MarkdownIt()
   md.use(await Shiki({
     themes: {
@@ -20,3 +20,37 @@ it('run', async () => {
 
   expect(result).toMatchFileSnapshot('./fixtures/a.out.html')
 })
+it('run for fallback language', async () => {
+  const md = MarkdownIt()
+  md.use(await Shiki({
+    themes: {
+      light: 'vitesse-light',
+      dark: 'vitesse-dark',
+    },
+    fallbackLanguage: 'js',
+    transformers: [
+      transformerMetaHighlight(),
+    ],
+  }))
+
+  const result = md.render(await fs.readFile(new URL('./fixtures/b.md', import.meta.url), 'utf-8'))
+
+  expect(result).toMatchFileSnapshot('./fixtures/b.out.html')
+})
+it('run for default language', async () => {
+  const md = MarkdownIt()
+  md.use(await Shiki({
+    themes: {
+      light: 'vitesse-light',
+      dark: 'vitesse-dark',
+    },
+    defaultLanguage: 'js',
+    transformers: [
+      transformerMetaHighlight(),
+    ],
+  }))
+
+  const result = md.render(await fs.readFile(new URL('./fixtures/c.md', import.meta.url), 'utf-8'))
+
+  expect(result).toMatchFileSnapshot('./fixtures/c.out.html')
+})