diff --git a/lab0510/lab0510.md b/lab0510/lab0510.md
index c39564440434c3f7b22750466afb2f94ffeb8ede..9ec49e019e1399573a9468d62df2da1f0ff792cd 100644
--- a/lab0510/lab0510.md
+++ b/lab0510/lab0510.md
@@ -9,3 +9,4 @@
 * br_a : 3rd change
 * br_a : 4th change
 * main : main change 5th
+* br_a : 6th change