diff --git a/mirko.go b/mirko.go
index a2ed85d..4a5f01f 100644
--- a/mirko.go
+++ b/mirko.go
@@ -22,8 +22,8 @@
 )
 
 func init() {
-	flag.StringVar(&flagListenAddress, "listen_address", "127.0.0.1:42000", "gRPC listen address")
-	flag.StringVar(&flagDebugAddress, "debug_address", "127.0.0.1:42001", "HTTP debug/status listen address")
+	flag.StringVar(&flagListenAddress, "listen_address", "127.0.0.1:4200", "gRPC listen address")
+	flag.StringVar(&flagDebugAddress, "debug_address", "127.0.0.1:4201", "HTTP debug/status listen address")
 	flag.Set("logtostderr", "true")
 }