diff --git a/src/frontend/app/ui/settings/thumbnail/thumbnail.settings.component.ts b/src/frontend/app/ui/settings/thumbnail/thumbnail.settings.component.ts
index afc5af75..506393a3 100644
--- a/src/frontend/app/ui/settings/thumbnail/thumbnail.settings.component.ts
+++ b/src/frontend/app/ui/settings/thumbnail/thumbnail.settings.component.ts
@@ -49,8 +49,8 @@ export class ThumbnailSettingsComponent
     );
   }
 
-  get Config(): { sizes: number } {
-    return {sizes: this.states.client.thumbnailSizes.original};
+  get Config(): { sizes: number[] } {
+    return {sizes: [this.states.client.thumbnailSizes.original[0]]};
   }
 
   get Progress(): JobProgressDTO {