diff --git a/plugin.rb b/plugin.rb
index f76a961..f4d072e 100644
--- a/plugin.rb
+++ b/plugin.rb
@@ -15,7 +15,7 @@ DiscoursePluginRegistry.serialized_current_user_fields << "signature_raw"
 
 after_initialize do
   register_user_custom_field_type("see_signatures", :boolean)
-  register_user_custom_field_type("signature_url", :string, max_length: 32000)
+  register_user_custom_field_type("signature_url", :string, max_length: 32_000)
   register_user_custom_field_type("signature_raw", :string, max_length: 1000)
 
   # add to class and serializer to allow for default value for the setting