lib/write_xlsx/workbook.rb in write_xlsx-0.65.0 vs lib/write_xlsx/workbook.rb in write_xlsx-0.65.1

@@ -1128,10 +1128,10 @@
                    ]
       if @tab_ratio != 500
         attributes << 'tabRatio' << @tab_ratio
       end
       if @firstsheet > 0
-        attributes << 'firstSheet' << @firstsheet
+        attributes << 'firstSheet' << @firstsheet + 1
       end
       if @activesheet > 0
         attributes << 'activeTab' << @activesheet
       end
       @writer.empty_tag('workbookView', attributes)