diff --git a/readme.md b/readme.md
index 68e10190..17c26613 100644
--- a/readme.md
+++ b/readme.md
@@ -24,5 +24,5 @@ BOJ Problem Count = 144
 
 ---
 
-last updated : Wed Jul 19 21:36:43 2023
+last updated : Thu Jul 20 21:36:41 2023