1 files changed, 1 insertions, 0 deletions
diff --git a/file.go b/file.go
index 3e49803..66b46c5 100644
--- a/file.go
+++ b/file.go
@@ -92,6 +92,7 @@ func (f *File) WriteToBuffer() (*bytes.Buffer, error) {
 	f.workbookRelsWriter()
 	f.worksheetWriter()
 	f.styleSheetWriter()
+	f.calcChainWriter()
 	for path, content := range f.XLSX {
 		fi, err := zw.Create(path)
 		if err != nil {