diff --git a/config/initializers/core_extensions.rb b/config/initializers/core_extensions.rb
index 837fbd18..2e9ed7e1 100644
--- a/config/initializers/core_extensions.rb
+++ b/config/initializers/core_extensions.rb
@@ -95,7 +95,7 @@ module Jekyll
           I18n.with_locale(locale) do
             raise ArgumentError, I18n.t('activerecord.errors.models.site.attributes.design_id.missing_gem', theme: name)
           rescue ArgumentError => e
-            ExceptionNotifier.notify_exception(e, data: { theme: name, site: site.path })
+            ExceptionNotifier.notify_exception(e, data: { theme: name, site: File.basename(site.source) })
             raise
           end
         end