diff --git a/config/application.rb b/config/application.rb
index 356cc169..95dbb4c2 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -19,6 +19,8 @@ module DocuSeal
   class Application < Rails::Application
     config.load_defaults 8.1
 
+    config.active_support.message_serializer = :json
+
     config.autoload_lib(ignore: %w[assets tasks puma])
 
     config.active_storage.routes_prefix = ''