diff --git a/account/account.go b/account/account.go
index c428b72..55b7305 100644
--- a/account/account.go
+++ b/account/account.go
@@ -128,7 +128,8 @@ func (a *Account) ImportPrivateKey(privateKeyStr string) (*PrivateKeySerialized,
 		return NewPrivateKeySerialized("", privateKey), nil
 	}
 
-	return nil, nil
+	privateKey := hd.Secp256k1.Generate()(priv)
+	return NewPrivateKeySerialized("", privateKey), nil
 }
 
 func (a *Account) ImportHdPath(mnemonic, hdPath string) (*PrivateKeySerialized, error) {
diff --git a/account/pubkey.go b/account/pubkey.go
index 3e0430e..8bcb6e5 100755
--- a/account/pubkey.go
+++ b/account/pubkey.go
@@ -4,25 +4,28 @@ import (
 	"encoding/hex"
 	"strings"
 
+	"github.com/cosmos/cosmos-sdk/crypto/keys/secp256k1"
 	cryptoTypes "github.com/cosmos/cosmos-sdk/crypto/types"
 	"github.com/cosmos/cosmos-sdk/types"
-	"github.com/evmos/ethermint/crypto/ethsecp256k1"
+	//"github.com/evmos/ethermint/crypto/ethsecp256k1"
 )
 
 type PKAccount struct {
-	publicKey ethsecp256k1.PubKey
+	//publicKey ethsecp256k1.PubKey  //evm
+	publicKey secp256k1.PubKey
 }
 
 func NewPKAccount(pubkey string) (*PKAccount, error) {
 	pubkey = strings.Split(strings.Split(pubkey, "{")[1], "}")[0]
-	
+
 	key, err := hex.DecodeString(pubkey)
 	if err != nil {
 		return nil, err
 	}
 
 	return &PKAccount{
-		publicKey: ethsecp256k1.PubKey{
+		publicKey: secp256k1.PubKey{
+			//publicKey: ethsecp256k1.PubKey{
 			Key: key,
 		},
 	}, nil