diff --git a/src/Form/Field/Image.php b/src/Form/Field/Image.php
index 800b5e54f0..730218d225 100644
--- a/src/Form/Field/Image.php
+++ b/src/Form/Field/Image.php
@@ -18,7 +18,7 @@ class Image extends File
      *
      * @var string
      */
-    protected $rules = 'image';
+    protected $rules = 'image|mimes:jpg,png,jpeg,gif,svg,webp';
 
     /**
      * @param array|UploadedFile $image