diff --git a/vendor/library/Excel/Writer/Parser.php b/vendor/library/Excel/Writer/Parser.php
index 535bd64..339bcbb 100644
--- a/vendor/library/Excel/Writer/Parser.php
+++ b/vendor/library/Excel/Writer/Parser.php
@@ -1077,7 +1077,7 @@ class Spreadsheet_Excel_Writer_Parser extends PEAR
     */
     function _cellToRowcol($cell)
     {
-        preg_match('/(\$)?([A-I]?[A-Z])(\$)?(\d+)/',$cell,$match);
+        preg_match('/(\$)?([A-Z]+)(\$)?(\d+)/', $cell, $match);
         // return absolute column if there is a $ in the ref
         $col_rel = empty($match[1]) ? 1 : 0;
         $col_ref = $match[2];