diff --git a/jtserv/jtserv.rb b/jtserv/jtserv.rb
index 763956d..5177459 100755
--- a/jtserv/jtserv.rb
+++ b/jtserv/jtserv.rb
@@ -24,7 +24,7 @@
     sq3 = ENV["JTSV_DB"]||"users.sq3"
     @db = SQLite3::Database.new(sq3)
     ### @db.results_as_hash = true
-    @expireskey = '+36 hours'
+    @expireskey = '+5 days'
     @expiretmpkey = '+1 hour'
     @from = 'postmaster@koeki-prj.org'
     @rank = %w(必須 標準 目標 一流 超一流 頂点)