diff --git a/app/models/metadata_image.rb b/app/models/metadata_image.rb
index 46b747c..f02b178 100644
--- a/app/models/metadata_image.rb
+++ b/app/models/metadata_image.rb
@@ -13,6 +13,6 @@ class MetadataImage < MetadataFile
 
   # Determina si es una imagen
   def image?
-    FileMagic.new(FileMagic::MAGIC_MIME).file(file).starts_with? 'image/'
+    filemagic.file(file).starts_with? 'image/'
   end
 end
diff --git a/app/services/post_service.rb b/app/services/post_service.rb
index 46e7a64..16607a4 100644
--- a/app/services/post_service.rb
+++ b/app/services/post_service.rb
@@ -98,7 +98,7 @@ PostService = Struct.new(:site, :usuarie, :post, :params, keyword_init: true) do
   # Eliminar metadatos internos
   def anon_post_params
     params.permit(post.params).delete_if do |k, _|
-      %w[date slug order uuid].include? k
+      %w[date slug order uuid].include? k.to_s
     end
   end
 
diff --git a/config/initializers/bootstrap_field_with_errors.rb b/config/initializers/bootstrap_field_with_errors.rb
index a372ed6..56b0a25 100644
--- a/config/initializers/bootstrap_field_with_errors.rb
+++ b/config/initializers/bootstrap_field_with_errors.rb
@@ -2,6 +2,8 @@
 # compatible con Bootstrap4.  La forma actual rompe los inputs
 # personalizados.
 ActionView::Base.field_error_proc = proc do |html_tag, _|
+  return unless html_tag
+
   html = Nokogiri::HTML::DocumentFragment.parse html_tag
   html.children.first.attributes['class'].value += ' is-invalid'
 
diff --git a/db/migrate/20200801230101_change_referer_to_origin.rb b/db/migrate/20200801230101_change_referer_to_origin.rb
index 9c320c1..6440e7b 100644
--- a/db/migrate/20200801230101_change_referer_to_origin.rb
+++ b/db/migrate/20200801230101_change_referer_to_origin.rb
@@ -2,6 +2,8 @@ class ChangeRefererToOrigin < ActiveRecord::Migration[6.0]
   def change
     rename_column :access_logs, :http_referer, :http_origin
 
+    return unless Rails.env.production?
+
     # Eliminar todos los referers anteriores manteniendo el origin
     ActiveRecord::Base.connection.execute("update access_logs set http_origin = split_part(http_origin, '/', 1) || '//' || split_part(http_origin, '/', 3) where http_origin is not null")
   end