diff --git a/app/models/site.rb b/app/models/site.rb
index 6d2226e..b371f6c 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -348,7 +348,7 @@ class Site < ApplicationRecord
     end
 
     # Eliminar el theme si no es una gema válida
-    @configuration.delete 'theme' unless theme_available?
+    @configuration.delete('theme') unless theme_available?
 
     # Si estamos usando nuestro propio plugin de i18n, los posts están
     # en "colecciones"