diff --git a/benchmark.go b/benchmark.go
index ccc7ce3bf..6ba46de0c 100644
--- a/benchmark.go
+++ b/benchmark.go
@@ -11,9 +11,9 @@ import (
 
 	"github.com/harmony-one/harmony/p2p/p2pimpl"
 
-	"github.com/harmony-one/harmony/attack"
 	"github.com/harmony-one/harmony/consensus"
 	"github.com/harmony-one/harmony/db"
+	"github.com/harmony-one/harmony/internal/attack"
 	"github.com/harmony-one/harmony/log"
 	pkg_newnode "github.com/harmony-one/harmony/newnode"
 	"github.com/harmony-one/harmony/node"
diff --git a/consensus/consensus_validator.go b/consensus/consensus_validator.go
index 2c9318420..0be0e3bee 100644
--- a/consensus/consensus_validator.go
+++ b/consensus/consensus_validator.go
@@ -2,12 +2,13 @@ package consensus
 
 import (
 	"bytes"
+
 	"github.com/dedis/kyber/sign/schnorr"
 	"github.com/ethereum/go-ethereum/rlp"
-	"github.com/harmony-one/harmony/attack"
 	consensus2 "github.com/harmony-one/harmony/consensus/proto"
 	"github.com/harmony-one/harmony/core/types"
 	"github.com/harmony-one/harmony/crypto"
+	"github.com/harmony-one/harmony/internal/attack"
 	"github.com/harmony-one/harmony/log"
 	proto_consensus "github.com/harmony-one/harmony/proto/consensus"
 	"github.com/harmony-one/harmony/utils"
diff --git a/attack/attack.go b/internal/attack/attack.go
similarity index 100%
rename from attack/attack.go
rename to internal/attack/attack.go