diff --git a/index.ts b/index.ts
index 60b019a..9169d0b 100644
--- a/index.ts
+++ b/index.ts
@@ -39,7 +39,7 @@ app.get('/', (req, res) => {
 });
 
 app.get('/cache-me.webp', (_, res) => {
-    res.set('Cache-Control', 'public, max-age=31557600'); // one year
+    res.set('Cache-Control', 'private, max-age=31557600'); // one year
     visitCount++;
     res.sendFile(Path.join(import.meta.dir, 'assets', 'webp', 'cache-me.webp'));
 });