diff --git a/IteratorFactory.php b/IteratorFactory.php
index 24aa15c..dacb561 100644
--- a/IteratorFactory.php
+++ b/IteratorFactory.php
@@ -17,7 +17,7 @@
 
 interface IteratorFactory
 {
-    public function fromFile(\SplFileObject $path, Mapping $mapping): Iterator;
+    public function fromFile(\SplFileObject $file, Mapping $mapping): Iterator;
 
     public function fromSpreadsheet(Spreadsheet $spreadsheet, Mapping $mapping): Iterator;
 }
diff --git a/Spreadsheet.php b/Spreadsheet.php
index 1d38d55..74612b8 100644
--- a/Spreadsheet.php
+++ b/Spreadsheet.php
@@ -15,6 +15,8 @@
 
 interface Spreadsheet
 {
+    public static function fromFile(\SplFileObject $file): self;
+
     /**
      * @param int $startRowIndex row index where this iterator starts, one-based
      */
diff --git a/SpreadsheetIteratorFactory.php b/SpreadsheetIteratorFactory.php
index aded32e..851c332 100644
--- a/SpreadsheetIteratorFactory.php
+++ b/SpreadsheetIteratorFactory.php
@@ -22,28 +22,30 @@ final class SpreadsheetIteratorFactory implements IteratorFactory
      */
     private $denormalizer;
 
-    public function __construct(Denormalizer $denormalizer)
+    /**
+     * @var array<class-string<Spreadsheet>>
+     */
+    private $spreadsheetClasses;
+
+    /**
+     * @param array<class-string<Spreadsheet>> $spreadsheetClasses
+     */
+    public function __construct(Denormalizer $denormalizer, array $spreadsheetClasses)
     {
         $this->denormalizer = $denormalizer;
+        $this->spreadsheetClasses = $spreadsheetClasses;
     }
 
     /**
      * @throws \RuntimeException
      */
-    public function fromFile(\SplFileObject $path, Mapping $mapping): Iterator
+    public function fromFile(\SplFileObject $file, Mapping $mapping): Iterator
     {
-        switch (true) {
-            case true === interface_exists(\PhpOffice\PhpSpreadsheet\Reader\IReader::class):
-                $spreadsheet = new Bridge\PhpSpreadsheet\Spreadsheet($path);
-                break;
-            case true === interface_exists(\Box\Spout\Reader\ReaderInterface::class):
-                $spreadsheet = new Bridge\Spout\Spreadsheet($path);
-                break;
-            default:
-                throw new \RuntimeException('Install either phpoffice/phpspreadsheet or box/spout to read Excel files');
+        foreach ($this->spreadsheetClasses as $spreadsheetClass) {
+            return $this->fromSpreadsheet($spreadsheetClass::fromFile($file), $mapping);
         }
 
-        return $this->fromSpreadsheet($spreadsheet, $mapping);
+        throw new \RuntimeException('Install either phpoffice/phpspreadsheet or box/spout to read Excel files');
     }
 
     public function fromSpreadsheet(Spreadsheet $spreadsheet, Mapping $mapping): Iterator
diff --git a/Test/SpreadsheetIteratorTest.php b/Test/SpreadsheetIteratorTest.php
index 2be1069..2e9a83c 100644
--- a/Test/SpreadsheetIteratorTest.php
+++ b/Test/SpreadsheetIteratorTest.php
@@ -73,7 +73,10 @@ public function testCanPerformNextCorrectly(): void
             'prev' => ['count' => 0, 'params' => null],
             'next' => ['count' => 1, 'params' => null],
         ]));
+        $key = $iterator->key();
         $iterator->next();
+
+        static::assertGreaterThan($key, $iterator->key());
     }
 
     public function testWillOfferAnDidYouMeanForInvalidHeader(): void