diff --git a/validator/server_arb/bold_machine.go b/validator/server_arb/bold_machine.go
index 45a439528f..6ca48ba228 100644
--- a/validator/server_arb/bold_machine.go
+++ b/validator/server_arb/bold_machine.go
@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/ethereum/go-ethereum/common"
+
 	"github.com/offchainlabs/nitro/validator"
 )