diff --git a/go.mod b/go.mod
index 719c8bec89..d39ec29fe9 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/miekg/dns
 go 1.19
 
 require (
-	golang.org/x/net v0.20.0
+	golang.org/x/net v0.21.0
 	golang.org/x/sync v0.6.0
 	golang.org/x/sys v0.17.0
 	golang.org/x/tools v0.17.0
diff --git a/go.sum b/go.sum
index 1d2881735b..aecf9cc725 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,7 @@
 golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
 golang.org/x/mod v0.14.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
-golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
-golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
+golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
 golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.17.0 h1:25cE3gD+tdBA7lp7QfhuV+rJiE9YXTcS3VG1SqssI/Y=