diff --git a/src/Umbraco.Web.BackOffice/Controllers/BackOfficeController.cs b/src/Umbraco.Web.BackOffice/Controllers/BackOfficeController.cs
index a52e018f58..5a95096aa6 100644
--- a/src/Umbraco.Web.BackOffice/Controllers/BackOfficeController.cs
+++ b/src/Umbraco.Web.BackOffice/Controllers/BackOfficeController.cs
@@ -281,6 +281,7 @@ namespace Umbraco.Cms.Web.BackOffice.Controllers
         }
 
         [Authorize(Policy = AuthorizationPolicies.BackOfficeAccess)]
+        [AngularJsonOnlyConfiguration]
         [HttpGet]
         public IEnumerable<IGridEditorConfig> GetGridConfig()
         {