diff --git a/lib/helpers/preprocess.rb b/lib/helpers/preprocess.rb
index 6c787de..09d4a8b 100644
--- a/lib/helpers/preprocess.rb
+++ b/lib/helpers/preprocess.rb
@@ -88,6 +88,7 @@ module PreprocessHelper
     type = type.to_s
     tags = @items.find_all("/#{type.downcase}/*/*")
       .flat_map { |i| i[:tags] || [] }
+      .flat_map { |i| i.split.map(&:capitalize).join(' ') }
       .uniq
 
     tags.each do |tag|