diff --git a/pkg/helper/windows.go b/pkg/helper/windows.go
index bc86e799f76e482f470f56f322f28ca0e7d6d86c..7e47884f1d411f2e0a52aee81075d6c9d133324d 100644
--- a/pkg/helper/windows.go
+++ b/pkg/helper/windows.go
@@ -34,6 +34,7 @@ const (
 var (
 	platformOpenvpnFlags = []string{
 		"--script-security", "1",
+		"--block-outside-dns",
 	}
 )