diff --git a/src/app/mii/[id]/image/route.ts b/src/app/mii/[id]/image/route.ts
index 6e20465..c8a744e 100644
--- a/src/app/mii/[id]/image/route.ts
+++ b/src/app/mii/[id]/image/route.ts
@@ -103,6 +103,7 @@ export async function GET(request: NextRequest, { params }: { params: Promise<{
 	return new NextResponse(buffer, {
 		headers: {
 			"Content-Type": "image/webp",
+			"X-Robots-Tag": "noindex, nofollow",
 		},
 	});
 }