diff --git a/bookwalker.md b/bookwalker.md
index 2ee1fe1..8747fd4 100644
--- a/bookwalker.md
+++ b/bookwalker.md
@@ -27,3 +27,4 @@
 | 2021/08/05 | 88折 | 0.88 |
 | 2021/08/08 | 漫畫輕小說點數30倍 + 滿1000元折100元 | 0.692 |
 | 2021/08/12 | 69折 | 0.69 |
+| 2021/08/20 | 79折 | 0.79 |