diff --git a/packages/docusaurus-theme-classic/src/theme/BlogLayout/index.tsx b/packages/docusaurus-theme-classic/src/theme/BlogLayout/index.tsx
index 30d68822c6..60f9b5e283 100644
--- a/packages/docusaurus-theme-classic/src/theme/BlogLayout/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/BlogLayout/index.tsx
@@ -27,7 +27,7 @@ export default function BlogLayout(props: Props): JSX.Element {
               'col--9 col--offset-1': !hasSidebar,
             })}
             itemScope
-            itemType="http://schema.org/Blog">
+            itemType="https://schema.org/Blog">
             {children}
           </main>
           {toc && <div className="col col--2">{toc}</div>}
diff --git a/packages/docusaurus-theme-classic/src/theme/BlogPostItem/Container/index.tsx b/packages/docusaurus-theme-classic/src/theme/BlogPostItem/Container/index.tsx
index 0cfb6b336f..05c12d3345 100644
--- a/packages/docusaurus-theme-classic/src/theme/BlogPostItem/Container/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/BlogPostItem/Container/index.tsx
@@ -27,7 +27,7 @@ export default function BlogPostItemContainer({
       className={className}
       itemProp="blogPost"
       itemScope
-      itemType="http://schema.org/BlogPosting">
+      itemType="https://schema.org/BlogPosting">
       {description && <meta itemProp="description" content={description} />}
       {image && (
         <link itemProp="image" href={withBaseUrl(image, {absolute: true})} />