diff --git a/2019/lectyres/program/while.rb b/2019/lectyres/program/while.rb
index 9115714..d2c5325 100644
--- a/2019/lectyres/program/while.rb
+++ b/2019/lectyres/program/while.rb
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 
 aisatu = 0
-while aisatu <= 5
+while aisatu < 5
   puts"こんにちは"
   aisatu += 1
 end