diff --git a/Stamp/README.md b/Stamp/README.md
index 643c8a3..058f6df 100644
--- a/Stamp/README.md
+++ b/Stamp/README.md
@@ -26,13 +26,13 @@
| Name | 04-06 (177th) | 04-13 (178th) | 04-20 (179th) | 04-27 (180th) | 05-04 (181th) | 05-11 (182th) | 05-18 (183th) | 05-25 (184th) | 06-01 (185th) | 06-08 (186th) | 06-15 (187th) | 06-22 (188th) | 06-29 (189th) |
|---------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|-------|
-| [Kim Jong Feel](https://github.com/jongfeel/) | | | | |
-| [Ji Yoon Choi](https://github.com/chichoon) | book 6/20 | book 7/20 | book 8/20 | book 9/20 |
-| [TaeWon](https://github.com/ytw9699/) | book 14/20 | book 15/20 | book 16/20 | book 17/20 |
-| [yeslee-v](https://github.com/yeslee-v/) | book 18/20 | book 19/20 | book 20/20 |
-| [Byeongguk Ahn](https://github.com/nonoaa/) | book 14/20 | | book 15/20 |
-| [YeongKwonMo](https://github.com/momoci99/) | | | book 10/20 |
-| [Jiyun Yun](https://github.com/jeeyn) | | book 11/20 |
+| [Kim Jong Feel](https://github.com/jongfeel/) | | | | | |
+| [Ji Yoon Choi](https://github.com/chichoon) | book 6/20 | book 7/20 | book 8/20 | book 9/20 | book 10/20 |
+| [TaeWon](https://github.com/ytw9699/) | book 14/20 | book 15/20 | book 16/20 | book 17/20 | book 18/20 |
+| [yeslee-v](https://github.com/yeslee-v/) | book 18/20 | book 19/20 | book 20/20 | | book 1/20 |
+| [Byeongguk Ahn](https://github.com/nonoaa/) | book 14/20 | | book 15/20 | | book 16/20 |
+| [YeongKwonMo](https://github.com/momoci99/) | | | book 10/20 | | book 11/20 |
+| [Jiyun Yun](https://github.com/jeeyn) | | book 11/20 | | | book 12/20 |
| [soo:bak](https://github.com/soo-bak/) | book 2/20 |
### 2024 1Q, 01-06 (164th) ~ 03-30 (176th)