diff --git a/src/Application/CsvParser.php b/src/Application/CsvParser.php
index 17a7a110..1398c16c 100644
--- a/src/Application/CsvParser.php
+++ b/src/Application/CsvParser.php
@@ -4,6 +4,7 @@
 
 namespace kissj\Application;
 
+use Iterator;
 use League\Csv\Exception as LeagueCsvException;
 use League\Csv\Reader;
 use Psr\Http\Message\StreamInterface;
@@ -15,9 +16,8 @@ class CsvParser
     /**
      * @throws UnexpectedValueException
      * @throws LeagueCsvException
-     * @return array<array<string,string>>
      */
-    public function parseCsv(UploadedFile $file): array
+    public function parseCsv(UploadedFile $file): Iterator
     {
         /** @var StreamInterface|null $stream */
         $stream = $file->getStream();
@@ -28,9 +28,6 @@ public function parseCsv(UploadedFile $file): array
         $csv = Reader::createFromString($stream->getContents());
         $csv->setHeaderOffset(0);
 
-        /** @var array<array<string,string>> $records */
-        $records = $csv->getRecords();
-
-        return $records;
+        return $csv->getRecords();
     }
 }
diff --git a/src/Import/ImportSrs.php b/src/Import/ImportSrs.php
index ecb82359..c6bbe817 100644
--- a/src/Import/ImportSrs.php
+++ b/src/Import/ImportSrs.php
@@ -38,6 +38,7 @@ public function importIst(UploadedFile $istsDataFile, Event $event): void
     {
         $istsData = [];
         try {
+            /** @var array<array<string,string>> $istsData */
             $istsData = $this->csvParser->parseCsv($istsDataFile);
         } catch (\UnexpectedValueException | LeagueCsvException) {
             $this->flashMessages->error($this->translator->trans('flash.error.importSrs.invalidCsv'));