diff --git a/app/application.rb b/app/application.rb
index bee989a..6346b31 100755
--- a/app/application.rb
+++ b/app/application.rb
@@ -1,4 +1,4 @@
-#!/usr/bin/env ruby2.5
+#!/usr/bin/env ruby25
 # coding: utf-8
 Encoding.default_external = "UTF-8"
 require 'kconv'