diff --git a/src/Writer/PngWriter.php b/src/Writer/PngWriter.php
index 4c448d7..e076518 100644
--- a/src/Writer/PngWriter.php
+++ b/src/Writer/PngWriter.php
@@ -80,7 +80,7 @@ private function createInterpolatedImage($baseImage, array $data, QrCodeInterfac
         $backgroundColor = imagecolorallocatealpha($image, $qrCode->getBackgroundColor()['r'], $qrCode->getBackgroundColor()['g'], $qrCode->getBackgroundColor()['b'], $qrCode->getBackgroundColor()['a']);
         imagefill($image, 0, 0, $backgroundColor);
         imagecopyresampled($image, $baseImage, $data['margin_left'], $data['margin_left'], 0, 0, $data['inner_width'], $data['inner_height'], imagesx($baseImage), imagesy($baseImage));
-
+        imagesavealpha($image, true);
         return $image;
     }