diff --git a/.php_cs b/.php_cs
index a5c691f8..d710559e 100644
--- a/.php_cs
+++ b/.php_cs
@@ -37,6 +37,7 @@ return PhpCsFixer\Config::create()
         'ordered_imports' => true,
         'declare_strict_types' => false,
         'native_function_invocation' => true,
+        'fopen_flags' => ['b_mode' => true],
     ])
     ->setFinder($finder)
 ;
diff --git a/Handler/DownloadHandler.php b/Handler/DownloadHandler.php
index 1686fd00..e37bdf3e 100644
--- a/Handler/DownloadHandler.php
+++ b/Handler/DownloadHandler.php
@@ -75,7 +75,7 @@ public function downloadObject($object, string $field, ?string $className = null
     private function createDownloadResponse($stream, string $filename, ?string $mimeType = 'application/octet-stream', bool $forceDownload = true): StreamedResponse
     {
         $response = new StreamedResponse(function () use ($stream): void {
-            \stream_copy_to_stream($stream, \fopen('php://output', 'w'));
+            \stream_copy_to_stream($stream, \fopen('php://output', 'wb'));
         });
 
         $disposition = $response->headers->makeDisposition(
diff --git a/Storage/AbstractStorage.php b/Storage/AbstractStorage.php
index 485d55de..b41ea9f6 100644
--- a/Storage/AbstractStorage.php
+++ b/Storage/AbstractStorage.php
@@ -108,7 +108,7 @@ public function resolveStream($obj, string $fieldName, ?string $className = null
             return null;
         }
 
-        return \fopen($path, 'r');
+        return \fopen($path, 'rb');
     }
 
     /**
diff --git a/Storage/FlysystemStorage.php b/Storage/FlysystemStorage.php
index 6a5fa263..a54ad491 100644
--- a/Storage/FlysystemStorage.php
+++ b/Storage/FlysystemStorage.php
@@ -34,7 +34,7 @@ protected function doUpload(PropertyMapping $mapping, UploadedFile $file, ?strin
         $fs = $this->getFilesystem($mapping);
         $path = !empty($dir) ? $dir.'/'.$name : $name;
 
-        $stream = \fopen($file->getRealPath(), 'r');
+        $stream = \fopen($file->getRealPath(), 'rb');
         $fs->putStream($path, $stream, [
             'mimetype' => $file->getMimeType(),
         ]);