diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82e625c..4914222 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,15 +6,20 @@ This project tries to follow [Semantic Versioning](http://semver.org/) since the
 
 This document mainly describes API changes important to users of this library.
 
-# 1.18.2 - 2022-06-24
+## 1.19.0 - 2022-08-16
+
+* Add support for locked sourceimages via `\Rokka\Client\Image::setProtected`.
+  See [the API Docs](https://api.rokka.io/doc/#/sourceimages/putSourceImageOptionsLocked) for details
+
+## 1.18.2 - 2022-06-24
 
 * Allow firebase/php-jwt 5.0 
 
-# 1.18.1 - 2022-06-24
+## 1.18.1 - 2022-06-24
 
 * Add mimetype attribute to SourceImage object.
 
-# 1.18.0 - 2022-05-31
+## 1.18.0 - 2022-05-31
 
 * Remove support for PHP 7.1
 * Add support for PHP 8.1
diff --git a/src/Core/SourceImage.php b/src/Core/SourceImage.php
index e01377c..fc3ef64 100644
--- a/src/Core/SourceImage.php
+++ b/src/Core/SourceImage.php
@@ -90,6 +90,11 @@ class SourceImage
      */
     public $protected;
 
+    /**
+     * @var bool
+     */
+    public $locked;
+
     /**
      * Constructor.
      *
@@ -107,6 +112,7 @@ class SourceImage
      * @param string    $link            Link to the image
      * @param string    $shortHash       The short hash
      * @param bool      $protected       Is image protected
+     * @param bool      $locked          Is image locked
      * @param mixed     $mimetype
      */
     public function __construct(
@@ -125,7 +131,8 @@ public function __construct(
         \DateTime $created,
         $link,
         $shortHash = null,
-        $protected = false
+        $protected = false,
+        $locked = false
     ) {
         $this->organization = $organization;
         $this->binaryHash = $binaryHash;
@@ -146,6 +153,7 @@ public function __construct(
         }
         $this->shortHash = $shortHash;
         $this->protected = $protected;
+        $this->locked = $locked;
     }
 
     /**
@@ -194,7 +202,8 @@ public static function createFromDecodedJsonResponse(array $data): self
             new \DateTime($data['created']),
             $data['link'],
             $data['short_hash'],
-            $data['protected']
+            $data['protected'],
+            $data['locked']
         );
     }
 
diff --git a/src/Image.php b/src/Image.php
index ab88d3e..4af2763 100644
--- a/src/Image.php
+++ b/src/Image.php
@@ -687,8 +687,6 @@ public function setDynamicMetadata($dynamicMetadata, $hash, $organization = '',
      */
     public function setProtected($protected, $hash, $organization = '', $options = [])
     {
-        $count = 0;
-        $response = null;
         $callOptions = [];
         $callOptions['json'] = $protected;
 
@@ -713,6 +711,39 @@ public function setProtected($protected, $hash, $organization = '', $options = [
         return $this->extractHashFromLocationHeader($response->getHeader('Location'));
     }
 
+    /**
+     * (Un)sets locked status to a SourceImage.
+     *
+     * @param bool   $locked       set the image to locked or no
+     *                             Or an array with more than one of those
+     * @param string $hash         The Image hash
+     * @param string $organization Optional organization name
+     *
+     * @throws GuzzleException
+     * @throws \RuntimeException
+     */
+    public function setLocked($locked, $hash, $organization = ''): SourceImage
+    {
+        $callOptions = [];
+        $callOptions['json'] = $locked;
+
+        $path = implode('/', [
+            self::SOURCEIMAGE_RESOURCE,
+            $this->getOrganizationName($organization),
+            $hash,
+            'options',
+            'locked',
+        ]);
+
+        $response = $this->call('PUT', $path, $callOptions);
+        if (!($response->getStatusCode() >= 200 && $response->getStatusCode() < 300)) {
+            throw new \LogicException($response->getBody()->getContents(), $response->getStatusCode());
+        }
+        $content = $response->getBody()->getContents();
+
+        return SourceImage::createFromJsonResponse($content);
+    }
+
     /**
      * @param string      $hash
      * @param string|null $organization
diff --git a/tests/Core/SourceImageTest.php b/tests/Core/SourceImageTest.php
index d0d3836..14a0cb0 100644
--- a/tests/Core/SourceImageTest.php
+++ b/tests/Core/SourceImageTest.php
@@ -28,6 +28,7 @@ public function createFromJsonDataProvider()
                 'created' => $image->created->format("Y-m-d\TH:i:s.uP"),
                 'link' => $image->link,
                 'protected' => $image->protected,
+                'locked' => $image->locked,
             ];
 
             foreach ($image->dynamicMetadata as $name => $meta) {