diff --git a/src/routes/post/img/[idpost]/+server.ts b/src/routes/post/img/[idpost]/+server.ts
index 6f88bab..debec56 100644
--- a/src/routes/post/img/[idpost]/+server.ts
+++ b/src/routes/post/img/[idpost]/+server.ts
@@ -212,7 +212,8 @@ export const GET: RequestHandler = async ({ params, fetch, request }) => {
 	return new Response(new Uint8Array(pngBuffer), {
 		headers: {
 			'Content-Type': 'image/png',
-			'Cache-Control': 'public, max-age=31536000, immutable'
+			'Cache-Control': 'public, max-age=31536000, immutable',
+			'Content-Length': pngBuffer.length.toString()
 		}
 	});
 };