1 files changed, 1 insertions, 1 deletions
diff --git a/styles.go b/styles.go
index 6ebb603..0a9cbef 100644
--- a/styles.go
+++ b/styles.go
@@ -999,7 +999,7 @@ func (f *File) stylesReader() *xlsxStyleSheet {
 func (f *File) styleSheetWriter() {
 	if f.Styles != nil {
 		output, _ := xml.Marshal(f.Styles)
-		f.saveFileList("xl/styles.xml", replaceWorkSheetsRelationshipsNameSpace(string(output)))
+		f.saveFileList("xl/styles.xml", replaceWorkSheetsRelationshipsNameSpaceBytes(output))
 	}
 }