diff --git a/README.md b/README.md
index f457e15..bdd5830 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ go get -u github.com/xiaoqidun/idkey
 # 使用方法
 ```go
 // 生成argon2id hash密码
-hash := idkey.Encode("admin")
+hash := idkey.Encode([]byte("admin"))
 // 进行argon2id hash验证
-verify := idkey.Verify("admin", hash)
+verify := idkey.Verify([]byte("admin"), hash)
 ```
diff --git a/idkey.go b/idkey.go
index 92c51ab..1c980ce 100644
--- a/idkey.go
+++ b/idkey.go
@@ -19,7 +19,7 @@ type Data struct {
 	KeyLen  uint32 // 密文长度
 }
 
-func Encode(password string) string {
+func Encode(password []byte) string {
 	salt := generateSalt(16)
 	data := &Data{
 		Hash:    nil,
@@ -30,7 +30,7 @@ func Encode(password string) string {
 		KeyLen:  32,
 	}
 	hash := argon2.IDKey(
-		[]byte(password),
+		password,
 		data.Salt,
 		data.Time,
 		data.Memory,
@@ -92,13 +92,13 @@ func Decode(passwordHash string) (data *Data, err error) {
 	return
 }
 
-func Verify(password, passwordHash string) bool {
+func Verify(password []byte, passwordHash string) bool {
 	data, err := Decode(passwordHash)
 	if err != nil {
 		return false
 	}
 	hash := argon2.IDKey(
-		[]byte(password),
+		password,
 		data.Salt,
 		data.Time,
 		data.Memory,