diff --git a/main.go b/main.go
index e103ee0..7256502 100644
--- a/main.go
+++ b/main.go
@@ -784,5 +784,6 @@ func errorhtml(w http.ResponseWriter, r *http.Request) {
 </html>`
 
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	w.WriteHeader(http.StatusForbidden)
 	_, _ = w.Write([]byte(html))
 }