diff --git a/controllers/ApiController.php b/controllers/ApiController.php
index 6628e0d..3b30e2d 100644
--- a/controllers/ApiController.php
+++ b/controllers/ApiController.php
@@ -22,6 +22,7 @@ class ApiController extends \yii\rest\Controller
             throw new NotFoundHttpException();
         }
 
+        $response->headers->set('Content-Type', $img->mime);
         $response->headers->set('X-Image-Data', json_encode($img->getAttributes()));
         return $response->sendFile(env('UPLOADS_PATH') . '/' . $img->sha256, $img->original_name);
     }