diff --git a/src/lib/content/contentApi.ts b/src/lib/content/contentApi.ts
index ab2e137..5dc06b7 100644
--- a/src/lib/content/contentApi.ts
+++ b/src/lib/content/contentApi.ts
@@ -18,7 +18,8 @@ const indexPageFields = [
     "author.profile_image.*",
 ];
 const allPageFields = [
-    ...indexPageFields
+    ...indexPageFields,
+    "date_created"
 ];
 const postPageFields = [...indexPageFields, "status", "content"];
 const authorPageFields = [
diff --git a/src/lib/content/directusUtils.ts b/src/lib/content/directusUtils.ts
index a7221f6..e93f09b 100644
--- a/src/lib/content/directusUtils.ts
+++ b/src/lib/content/directusUtils.ts
@@ -77,6 +77,7 @@ export const mapSitemapPosts = (post: any) => {
         excerpt: post.excerpt,
         date_published: post.date_published,
         date_updated: post.date_updated,
+        last_modified: post.date_updated ?? post.date_created,
         reading_time: null,
         url: generatePostUrl(category?.slug, post.slug),
     }
diff --git a/src/routes/sitemap.xml/+server.ts b/src/routes/sitemap.xml/+server.ts
index 1a166ad..55ba689 100644
--- a/src/routes/sitemap.xml/+server.ts
+++ b/src/routes/sitemap.xml/+server.ts
@@ -18,7 +18,7 @@ export async function GET() {
         allPosts.map((_post) => {
             xml += '<url>'
             xml += `<loc>${_post.url}</loc>`
-            xml += `<lastmod>${dayjs(_post.date_updated).format('YYYY-MM-DDTHH:mm:ss[+07:00]')}</lastmod>`
+            xml += `<lastmod>${dayjs(_post.last_modified).format('YYYY-MM-DDTHH:mm:ss[+07:00]')}</lastmod>`
             xml += `<changefreq>always</changefreq>`
             xml += `<priority>0.5</priority>`
             xml += '</url>'