diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index b8fc9081e6..4bce4f6300 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -745,7 +745,7 @@ func RegisterEthService(ctx *cli.Context, stack *node.Node, extra []byte) {
 	switch {
 	case ctx.GlobalBool(OlympicFlag.Name):
 		if !ctx.GlobalIsSet(NetworkIdFlag.Name) {
-			ethConf.NetworkId = 1
+			ethConf.NetworkId = 88
 		}
 		ethConf.Genesis = core.OlympicGenesisBlock()
 
diff --git a/eth/protocol.go b/eth/protocol.go
index f058596cca..a657fa9546 100644
--- a/eth/protocol.go
+++ b/eth/protocol.go
@@ -42,7 +42,7 @@ var ProtocolVersions = []uint{eth63, eth62}
 var ProtocolLengths = []uint64{17, 8}
 
 const (
-	NetworkId          = 1
+	NetworkId          = 88
 	ProtocolMaxMsgSize = 10 * 1024 * 1024 // Maximum cap on the size of a protocol message
 )
 
diff --git a/les/protocol.go b/les/protocol.go
index 4eaaef87c7..e2b9f5892d 100644
--- a/les/protocol.go
+++ b/les/protocol.go
@@ -39,7 +39,7 @@ var ProtocolVersions = []uint{lpv1}
 var ProtocolLengths = []uint64{15}
 
 const (
-	NetworkId          = 1
+	NetworkId          = 88
 	ProtocolMaxMsgSize = 10 * 1024 * 1024 // Maximum cap on the size of a protocol message
 )