diff --git a/docs/.vitepress/config.mts b/docs/.vitepress/config.mts
index ecd2f02..423d222 100644
--- a/docs/.vitepress/config.mts
+++ b/docs/.vitepress/config.mts
@@ -138,6 +138,10 @@ export default extendConfig(
       description:
         "Self-host Plane, integrate with our API, configure webhooks, and extend your project management platform. Complete guides for developers building on Plane.",
 
+      // SEO: Per-page lastmod in sitemap.xml from each file's latest git commit.
+      // Requires full git history at build time (see package.json build script).
+      lastUpdated: true,
+
       // SEO: Generate sitemap automatically
       sitemap: {
         hostname: "https://developers.plane.so",
diff --git a/package.json b/package.json
index 1c1cd4f..fb7e71c 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "vitepress dev docs",
-    "build": "vitepress build docs",
+    "build": "(git fetch --unshallow || true) && vitepress build docs",
     "preview": "vitepress preview docs",
     "fix:format": "prettier --write .",
     "check:format": "prettier --check .",