diff --git a/app/models/tag.rb b/app/models/tag.rb
index 7b23605..3cf3b3f 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -1,2 +1,4 @@
 class Tag < ApplicationRecord
+  # needed because we have a column called 'type'
+  self.inheritance_column = '_inheritance_column'
 end