diff --git a/README.md b/README.md
index 57a0148..52f4045 100644
--- a/README.md
+++ b/README.md
@@ -268,4 +268,5 @@ problems from
 * [Day 254](https://github.com/vaskoz/dailycodingproblem-go/issues/523)
 * [Day 255](https://github.com/vaskoz/dailycodingproblem-go/issues/525)
 * [Day 256](https://github.com/vaskoz/dailycodingproblem-go/issues/528)
+* [Day 257](https://github.com/vaskoz/dailycodingproblem-go/issues/529)
 * [Day 258](https://github.com/vaskoz/dailycodingproblem-go/issues/530)