diff --git a/README.md b/README.md
index 3351253..e59b7ce 100644
--- a/README.md
+++ b/README.md
@@ -31,8 +31,8 @@ composer require joppuyo/jpeg-xl-encode
 $source = '/absolute/path/to/source.jpeg';
 $destination = '/absolute/path/to/destination.jxl';
 $options = [
-    'encoding': 'lossy',
-    'quality': 80,
+    'encoding' => 'lossy',
+    'quality' => 80,
 ];
 try {
     \Joppuyo\JpegXlEncode\Encoder::encode($source, $destination, $options);