diff --git a/app/assets/javascripts/admin/addon/components/theme-translation.js b/app/assets/javascripts/admin/addon/components/theme-translation.js
index 3bb229ed16a..c111b350515 100644
--- a/app/assets/javascripts/admin/addon/components/theme-translation.js
+++ b/app/assets/javascripts/admin/addon/components/theme-translation.js
@@ -17,7 +17,7 @@ export default class ThemeTranslation extends SiteSettingComponent {
 
     return ajax(this.updateUrl, {
       type: "PUT",
-      data: { theme: translations },
+      data: { theme: { translations } },
     });
   }
 }