diff --git a/src/schema/picker.schema.ts b/src/schema/picker.schema.ts
index 34dd60bc..e2b96bfa 100644
--- a/src/schema/picker.schema.ts
+++ b/src/schema/picker.schema.ts
@@ -57,35 +57,38 @@ export const PickerParamsSchema = {
     },
     fromSources: {
       type: 'array',
-      items: [
-        {
-          type: ['string', 'object'],
-          additionalProperties: false,
-          enum: [
-            'local_file_system',
-            'url',
-            'imagesearch',
-            'facebook',
-            'instagram',
-            'googledrive',
-            'unsplash',
-            'dropbox',
-            'webcam',
-            'video',
-            'audio',
-            'box',
-            'github',
-            'gmail',
-            'googlephotos',
-            'onedrive',
-            'onedriveforbusiness',
-            'clouddrive',
-            'googlephotos',
-            'customsource',
-            'tint',
-          ],
-        },
-      ],
+      items: {
+        anyOf: [
+          {
+            type: 'string',
+            enum: [
+              'local_file_system',
+              'url',
+              'imagesearch',
+              'facebook',
+              'instagram',
+              'googledrive',
+              'unsplash',
+              'dropbox',
+              'webcam',
+              'video',
+              'audio',
+              'box',
+              'github',
+              'gmail',
+              'googlephotos',
+              'onedrive',
+              'onedriveforbusiness',
+              'clouddrive',
+              'customsource',
+              'tint',
+            ],
+          },
+          {
+            type: 'object',
+          },
+        ],
+      },
     },
     container: {
       format: 'HTMLContainer',