diff --git a/app/controllers/contestants_controller.rb b/app/controllers/contestants_controller.rb
index b2fd319..e4d741b 100644
--- a/app/controllers/contestants_controller.rb
+++ b/app/controllers/contestants_controller.rb
@@ -151,7 +151,7 @@ class ContestantsController < ApplicationController
 
     stringio = Zip::OutputStream.write_buffer do |zio|
       @contestants.each do |contestant|
-        zio.put_next_entry("#{@contest.friendly_id}_#{contestant.name}.svg")
+        zio.put_next_entry("#{@contest.friendly_id}_#{ActiveSupport::Inflector.transliterate contestant.name.downcase.gsub(/\s/, "_")}.svg")
         zio.write contestant.qrcode
       end
     end