diff --git a/eth/config.go b/eth/config.go
index b881a7fdf7..abcbdc8cca 100644
--- a/eth/config.go
+++ b/eth/config.go
@@ -43,7 +43,7 @@ var DefaultConfig = Config{
 		DatasetsInMem:  1,
 		DatasetsOnDisk: 2,
 	},
-	NetworkId:     1,
+	NetworkId:     101,
 	LightPeers:    100,
 	DatabaseCache: 768,
 	TrieCache:     256,