diff --git a/pages/robots.txt.tsx b/pages/robots.txt.tsx
index 270686e..8aaa921 100644
--- a/pages/robots.txt.tsx
+++ b/pages/robots.txt.tsx
@@ -13,10 +13,8 @@ export const getServerSideProps: GetServerSideProps = async ({ req, res }) => {
     }
   }
 
-  res.setHeader(
-    'Cache-Control',
-    'public, s-maxage=3600, max-age=3600, stale-while-revalidate=3600'
-  )
+  // cache for up to one day
+  res.setHeader('Cache-Control', 'public, max-age=86400, immutable')
   res.setHeader('Content-Type', 'text/plain')
 
   // only allow the site to be crawlable on the production deployment
diff --git a/pages/sitemap.xml.tsx b/pages/sitemap.xml.tsx
index 0f6dce8..69684f8 100644
--- a/pages/sitemap.xml.tsx
+++ b/pages/sitemap.xml.tsx
@@ -16,10 +16,10 @@ export const getServerSideProps: GetServerSideProps = async ({ req, res }) => {
 
   const siteMaps = await getSiteMaps()
 
-  // cache for up to one hour
+  // cache for up to 8 hours
   res.setHeader(
     'Cache-Control',
-    'public, s-maxage=3600, max-age=3600, stale-while-revalidate=3600'
+    'public, max-age=28800, stale-while-revalidate=28800'
   )
   res.setHeader('Content-Type', 'text/xml')
   res.write(createSitemap(siteMaps[0]))