diff --git a/content/markdown-showcase.md b/content/markdown-showcase.md
index afa5a2fb1..9381138ca 100644
--- a/content/markdown-showcase.md
+++ b/content/markdown-showcase.md
@@ -104,7 +104,7 @@ Let us use some `inline code` and check out how it `looks`. Here's some `more`.
 ### Code Blocks
 
 ```html
-<html>
+<html lang="en">
   <head>
     <div style="background-color: #333;">
       <a href="https://example.com/">Example</a>
diff --git a/quartz/components/renderPage.tsx b/quartz/components/renderPage.tsx
index 1ed05a704..abc0009ad 100644
--- a/quartz/components/renderPage.tsx
+++ b/quartz/components/renderPage.tsx
@@ -210,7 +210,7 @@ export function renderPage(
   )
 
   const doc = (
-    <html>
+    <html lang="en">
       <Head {...componentData} />
       <body data-slug={slug}>
         <div id="quartz-root" class="page">
diff --git a/quartz/plugins/emitters/aliases.ts b/quartz/plugins/emitters/aliases.ts
index d407629db..963c84001 100644
--- a/quartz/plugins/emitters/aliases.ts
+++ b/quartz/plugins/emitters/aliases.ts
@@ -33,7 +33,7 @@ export const AliasRedirects: QuartzEmitterPlugin = () => ({
           ctx,
           content: `
             <!DOCTYPE html>
-            <html lang="en-us">
+            <html lang="en">
             <head>
             <title>${ogSlug}</title>
             <link rel="canonical" href="${redirUrl}">
