diff --git a/Caddyfile b/Caddyfile
index 918d68e..c273231 100755
--- a/Caddyfile
+++ b/Caddyfile
@@ -34,6 +34,11 @@ portfolio.lucasroyer.fr {
 		ttl 24h
 		stale 12h
 	}
+	header {
+        # s-maxage=86400 : proxy keep html in RAM for 24h
+        # max-age=0 : client browser check every time with etag
+        # must-revalidate : ask server if it is steel up to date
+        Cache-Control "public, s-maxage=86400, max-age=0, must-revalidate"
 
 	# Security
 	header {