diff --git a/Classes/PHPExcel/Reader/Excel5.php b/Classes/PHPExcel/Reader/Excel5.php
index 62e971d2e..f256606a3 100644
--- a/Classes/PHPExcel/Reader/Excel5.php
+++ b/Classes/PHPExcel/Reader/Excel5.php
@@ -3609,7 +3609,7 @@ private function readRow()
             // bit: 27-16; mask: 0x0FFF0000; only applies when hasExplicitFormat = 1; index to XF record
             $xfIndex = (0x0FFF0000 & self::getInt4d($recordData, 12)) >> 16;
 
-            if ($hasExplicitFormat) {
+            if ($hasExplicitFormat && isset($this->mapCellXfIndex[$xfIndex])) {
                 $this->phpSheet->getRowDimension($r + 1)->setXfIndex($this->mapCellXfIndex[$xfIndex]);
             }
         }
diff --git a/composer.json b/composer.json
index 8aa448025..ed61c3ccf 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,5 @@
 {
-    "name": "phpoffice/phpexcel",
+    "name": "omcrn/phpexcel",
     "description": "PHPExcel - OpenXML - Read, Create and Write Spreadsheet documents in PHP - Spreadsheet engine",
     "keywords": ["PHP","Excel","OpenXML","xlsx","xls","spreadsheet"],
     "homepage": "https://github.com/PHPOffice/PHPExcel",