diff --git a/sig/app/models/application_record.rbs b/sig/app/models/application_record.rbs
index 0684417a8c3d5c..b0a4aaa38d564c 100644
--- a/sig/app/models/application_record.rbs
+++ b/sig/app/models/application_record.rbs
@@ -4,4 +4,5 @@
 class ApplicationRecord
   def self.update_index: (untyped _type_name, *untyped _args) -> nil
   def boolean_with_default: (untyped key, untyped default_value) -> untyped
+  def as_json:() -> untyped
 end