diff --git a/core/response/write.go b/core/response/write.go
index 7656b33d..cb1fa0bd 100644
--- a/core/response/write.go
+++ b/core/response/write.go
@@ -48,8 +48,8 @@ func WriteServerError(w http.ResponseWriter, method string, err error) {
 
 // WriteError notifies HTTP client of general application error.
 func WriteError(w http.ResponseWriter, method string) {
-    writeStatus(w, http.StatusBadRequest)
-    w.Write([]byte("{Error: 'Internal server error'}"))
+	writeStatus(w, http.StatusBadRequest)
+	w.Write([]byte("{Error: 'Internal server error'}"))
 }
 
 // WriteDuplicateError notifies HTTP client of duplicate data that has been rejected.
@@ -114,3 +114,17 @@ func WriteJSON(w http.ResponseWriter, v interface{}) {
 	j, _ := json.Marshal(v)
 	w.Write(j)
 }
+
+// WriteText to HTTP response
+func WriteText(w http.ResponseWriter, data []byte) {
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+	w.WriteHeader(http.StatusOK)
+	w.Write(data)
+}
+
+// WriteXML to HTTP response
+func WriteXML(w http.ResponseWriter, data []byte) {
+	w.Header().Set("Content-Type", "application/xml; charset=utf-8")
+	w.WriteHeader(http.StatusOK)
+	w.Write(data)
+}
diff --git a/domain/meta/endpoint.go b/domain/meta/endpoint.go
index 8ddf0997..2a17dea4 100644
--- a/domain/meta/endpoint.go
+++ b/domain/meta/endpoint.go
@@ -138,7 +138,7 @@ Disallow: /attachment/*
 Sitemap: %s`, sitemap)
 	}
 
-	response.WriteBytes(w, []byte(robots))
+	response.WriteText(w, []byte(robots))
 }
 
 // Sitemap returns URLs that can be indexed.
@@ -205,7 +205,7 @@ func (h *Handler) Sitemap(w http.ResponseWriter, r *http.Request) {
 	t := template.Must(template.New("tmp").Parse(sitemap))
 	t.Execute(buffer, &items)
 
-	response.WriteBytes(w, buffer.Bytes())
+	response.WriteXML(w, buffer.Bytes())
 }
 
 type sitemapItem struct {