diff --git a/packages/fontless/src/vite.ts b/packages/fontless/src/vite.ts
index 09f1be31..89ab52e9 100644
--- a/packages/fontless/src/vite.ts
+++ b/packages/fontless/src/vite.ts
@@ -91,6 +91,7 @@ export function fontless(_options?: FontlessOptions): Plugin {
             data = await fetch(url).then(r => r.arrayBuffer()).then(r => Buffer.from(r))
             await storage.setItemRaw(key, data)
           }
+          res.setHeader('Cache-Control', 'public, max-age=31536000, immutable')
           res.end(data)
         }
         catch (e) {