diff --git a/master_key_test.go b/master_key_test.go
index 67bf586..bdd4627 100644
--- a/master_key_test.go
+++ b/master_key_test.go
@@ -29,12 +29,19 @@ func TestMasterKey(t *testing.T) {
 
 		buf, err = master.DeriveChild(fmt.Sprintf("m/%v", i))
 		assert.Nil(t, err)
+
 		cred, err = NewCredential(buf, 0, nil, PyrmontSetting)
 		assert.Nil(t, err)
 		text, err = cred.MarshalText()
 		assert.Nil(t, err)
 		t.Log("pyrmont:", string(text))
 
+		cred, err = NewCredential(buf, 0, nil, HoleskySetting)
+		assert.Nil(t, err)
+		text, err = cred.MarshalText()
+		assert.Nil(t, err)
+		t.Log("holesky:", string(text))
+
 		buf.Destroy()
 	}
 }
diff --git a/settings.go b/settings.go
index 9b4923d..ffcf543 100644
--- a/settings.go
+++ b/settings.go
@@ -16,12 +16,14 @@ const (
 	MAINNET = "mainnet"
 	PYRMONT = "pyrmont"
 	PRATER  = "prater"
+	HOLESKY = "holesky"
 )
 
 var (
 	MainnetSetting BaseChainSetting
 	PyrmontSetting BaseChainSetting
 	PraterSetting  BaseChainSetting
+	HoleskySetting BaseChainSetting
 )
 
 func init() {
@@ -35,4 +37,8 @@ func init() {
 	// Eth2 testnet (spec v1.0.1)
 	PraterSetting.ETH2_NETWORK_NAME = PRATER
 	binary.BigEndian.PutUint32(PraterSetting.GENESIS_FORK_VERSION[:], 0x00001020)
+
+	// Holesky setting
+	HoleskySetting.ETH2_NETWORK_NAME = HOLESKY
+	binary.BigEndian.PutUint32(HoleskySetting.GENESIS_FORK_VERSION[:], 0x01017000)
 }