diff --git a/replication/event.go b/replication/event.go
index 18dbf6958..c7b848db4 100644
--- a/replication/event.go
+++ b/replication/event.go
@@ -427,12 +427,12 @@ type GTIDEvent struct {
 	SequenceNumber int64
 
 	// ImmediateCommitTimestamp/OriginalCommitTimestamp are introduced in MySQL-8.0.1, see:
-	// https://mysqlhighavailability.com/replication-features-in-mysql-8-0-1/
+	// https://dev.mysql.com/blog-archive/new-monitoring-replication-features-and-more
 	ImmediateCommitTimestamp uint64
 	OriginalCommitTimestamp  uint64
 
 	// Total transaction length (including this GTIDEvent), introduced in MySQL-8.0.2, see:
-	// https://mysqlhighavailability.com/taking-advantage-of-new-transaction-length-metadata/
+	// https://dev.mysql.com/blog-archive/taking-advantage-of-new-transaction-length-metadata
 	TransactionLength uint64
 
 	// ImmediateServerVersion/OriginalServerVersion are introduced in MySQL-8.0.14, see