diff --git a/app/application.rb b/app/application.rb
index 4f2c24e..8dff40d 100755
--- a/app/application.rb
+++ b/app/application.rb
@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 # coding: utf-8
-Encoding.default_external = 'utf-8'
+Encoding.default_external = "UTF-8"
 require 'kconv'
 require 'cgi'