diff --git a/CHANGES.md b/CHANGES.md
index 2d344a7..d5ec5f0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,4 +1,4 @@
-## Unreleased
+## 1.7.0
 
 * Added `Format` constants for the media types `convert` accepts, including JPEG XL (`image/jxl`).
 
diff --git a/README.md b/README.md
index 59d5030..26c675b 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,28 @@ Tinify\setKey("YOUR_API_KEY");
 Tinify\fromFile("unoptimized.png")->toFile("optimized.png");
 ```
 
+Convert to another format with the `Tinify\Format` constants (`WEBP`, `PNG`,
+`JPEG`, `JPG`, `AVIF`, `JXL` and `ANY`):
+
+```php
+Tinify\fromFile("unoptimized.png")
+    ->convert(array("type" => Tinify\Format::JXL))
+    ->toFile("optimized.jxl");
+```
+
+Pass several and the API returns the smallest result:
+
+```php
+$converted = Tinify\fromFile("unoptimized.png")
+    ->convert(array("type" => array(Tinify\Format::JXL, Tinify\Format::WEBP)));
+
+$result = $converted->result();
+echo $result->mediaType(); // the format the API picked
+$result->toFile("optimized");
+```
+
+The constants are plain strings, so `"type" => "image/jxl"` keeps working.
+
 ## Running tests
 
 ```
diff --git a/lib/Tinify.php b/lib/Tinify.php
index cce7f68..db2aea0 100644
--- a/lib/Tinify.php
+++ b/lib/Tinify.php
@@ -2,7 +2,7 @@
 
 namespace Tinify;
 
-const VERSION = "1.6.4";
+const VERSION = "1.7.0";
 
 class Tinify {
     /**