diff --git a/internal/dav/listing.go b/internal/dav/listing.go
index 5b4f8fc..156856d 100644
--- a/internal/dav/listing.go
+++ b/internal/dav/listing.go
@@ -1,6 +1,7 @@
 package dav
 
 import (
+	"bytes"
 	"fmt"
 	"path/filepath"
 	"sort"
@@ -32,8 +33,9 @@ func HandleListTorrents(directory string, torMgr *torrent.TorrentManager, log *l
 		return nil, fmt.Errorf("cannot find directory %s", directory)
 	}
 
-	davDoc := "<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">"
-	davDoc += dav.Directory("", "")
+	var buf bytes.Buffer
+	buf.WriteString("<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">")
+	buf.WriteString(dav.BaseDirectory(directory, ""))
 	var allTorrents []*torrent.Torrent
 	torrents.IterCb(func(_ string, tor *torrent.Torrent) {
 		if tor.AllInProgress() {
@@ -45,10 +47,10 @@ func HandleListTorrents(directory string, torMgr *torrent.TorrentManager, log *l
 		return allTorrents[i].AccessKey < allTorrents[j].AccessKey
 	})
 	for _, tor := range allTorrents {
-		davDoc += dav.Directory(tor.AccessKey, tor.LatestAdded)
+		buf.WriteString(dav.Directory(tor.AccessKey, tor.LatestAdded))
 	}
-	davDoc += "</d:multistatus>"
-	return []byte(davDoc), nil
+	buf.WriteString("</d:multistatus>")
+	return buf.Bytes(), nil
 }
 
 func HandleListFiles(directory, torrentName string, torMgr *torrent.TorrentManager, log *logutil.Logger) ([]byte, error) {
@@ -61,7 +63,9 @@ func HandleListFiles(directory, torrentName string, torMgr *torrent.TorrentManag
 		return nil, fmt.Errorf("cannot find torrent %s", torrentName)
 	}
 
-	davDoc := "<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">" + dav.BaseDirectory(filepath.Join(directory, tor.AccessKey), tor.LatestAdded)
+	var buf bytes.Buffer
+	buf.WriteString("<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">")
+	buf.WriteString(dav.BaseDirectory(filepath.Join(directory, tor.AccessKey), tor.LatestAdded))
 	filenames := tor.SelectedFiles.Keys()
 	sort.Strings(filenames)
 	for _, filename := range filenames {
@@ -69,10 +73,10 @@ func HandleListFiles(directory, torrentName string, torMgr *torrent.TorrentManag
 		if !ok || !strings.HasPrefix(file.Link, "http") {
 			continue
 		}
-		davDoc += dav.File(filename, file.Bytes, file.Ended)
+		buf.WriteString(dav.File(filename, file.Bytes, file.Ended))
 	}
-	davDoc += "</d:multistatus>"
-	return []byte(davDoc), nil
+	buf.WriteString("</d:multistatus>")
+	return buf.Bytes(), nil
 }
 
 func HandlePropfindFile(directory, torrentName, fileName string, torMgr *torrent.TorrentManager, log *logutil.Logger) ([]byte, error) {
@@ -88,8 +92,11 @@ func HandlePropfindFile(directory, torrentName, fileName string, torMgr *torrent
 	if !ok || !strings.HasPrefix(file.Link, "http") {
 		return nil, fmt.Errorf("cannot find file %s", fileName)
 	}
-	davDoc := "<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">" + dav.BaseDirectory(filepath.Join(directory, tor.AccessKey), tor.LatestAdded)
-	davDoc += dav.File(fileName, file.Bytes, file.Ended)
-	davDoc += "</d:multistatus>"
-	return []byte(davDoc), nil
+
+	var buf bytes.Buffer
+	buf.WriteString("<?xml version=\"1.0\" encoding=\"utf-8\"?><d:multistatus xmlns:d=\"DAV:\">")
+	buf.WriteString(dav.BaseDirectory(filepath.Join(directory, tor.AccessKey), tor.LatestAdded))
+	buf.WriteString(dav.File(fileName, file.Bytes, file.Ended))
+	buf.WriteString("</d:multistatus>")
+	return buf.Bytes(), nil
 }