diff --git a/src/static-data.rkt b/src/static-data.rkt
index c08c83a..1255ca5 100644
--- a/src/static-data.rkt
+++ b/src/static-data.rkt
@@ -21,13 +21,17 @@
                                          (build-path path-static path-or-filename))))
   (format "/static/~a?t=~a" (file-name-from-path the-path) (hash-ref static-data the-path)))
 
+; https://developer.mozilla.org/en-US/docs/Web/HTML/Link_types/preload
 (: link-header String)
 (define link-header
-  (let* ([with-t '("main.css")]
-         [with-t-full (map get-static-url with-t)]
-         [without-t '("preact.js" "source-sans-pro-v21-vietnamese_latin-ext_latin_greek-ext_greek_cyrillic-ext_cyrillic-regular.woff2")]
-         [without-t-full (map (λ (path) (format "/static/~a" path)) without-t)])
-    (string-join
-     (for/list : (Listof String) ([full-path : String (append with-t-full without-t-full)])
-       (format "<~a>; rel=\"preload\"" full-path))
-     ", ")))
+  (let* ([with-t '(("main.css" "as=style"))]
+         [without-t '(("preact.js" "as=script")
+                      ("source-sans-pro-v21-vietnamese_latin-ext_latin_greek-ext_greek_cyrillic-ext_cyrillic-regular.woff2" "as=font" "crossorigin" "type=font/woff2"))]
+         [with-t-full (map (λ ([path : (Listof String)]) (cons (get-static-url (car path)) (cdr path))) with-t)]
+         [without-t-full (map (λ ([path : (Listof String)]) (cons (format "/static/~a" (car path)) (cdr path))) without-t)]
+         [all (append with-t-full without-t-full)]
+         [header-parts
+          (for/list : (Listof String) ([full-path all])
+            (define attributes (map (λ ([s : String]) (format "; ~a" s)) (cdr full-path)))
+            (format "<~a>; rel=preload~a" (car full-path) (string-join attributes "")))])
+    (string-join header-parts ", ")))