diff --git a/Classes/Service/Resources/Excel.php b/Classes/Service/Resources/Excel.php
index 5b8c4da..b488db8 100644
--- a/Classes/Service/Resources/Excel.php
+++ b/Classes/Service/Resources/Excel.php
@@ -7,7 +7,7 @@
 use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\IOFactory;
 use PhpOffice\PhpSpreadsheet\Reader\IReader;
-use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Core\Core\Environment;
 
 /**
  * Description of Excel
@@ -66,10 +66,10 @@ public function parseResource()
         $configuration = $this->getConfiguration();
 
         if (!\class_exists(IOFactory::class)) {
-            throw new \Exception('PHP Excel is needed! Please install phpoffice/phpexcel (composer mode)', 12367812368);
+            throw new \Exception('PHP Excel is needed! Please install phpoffice/phpspreadsheet (composer mode)', 12367812368);
         }
 
-        $filename = GeneralUtility::getFileAbsFileName($this->filepath);
+        $filename = Environment::getPublicPath() . $this->filepath;
         /** @var IReader $reader */
         $reader = IOFactory::createReaderForFile($filename);
         $reader->setReadDataOnly(true);
@@ -88,7 +88,7 @@ public function parseResource()
         for ($row = 1 + $configuration['skipRows']; $row <= $highestRow; ++$row) {
             $rowRecord = [];
             for ($col = 0; $col <= $highestColumnIndex; ++$col) {
-                $rowRecord[] = \trim(
+                $rowRecord[] = \trim((string)
                     $worksheet->getCellByColumnAndRow($col, $row)
                         ->getValue()
                 );
diff --git a/composer.json b/composer.json
index 4d23ce1..7af1082 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
     "typo3/cms-core": "^10.4||^11.5"
   },
   "suggest": {
-    "phpoffice/phpexcel": "Use Excel files as import resource"
+    "phpoffice/phpspreadsheet": "Use Excel files as import resource"
   },
   "replace": {
     "typo3-ter/importr": "self.version"