diff --git a/base62json.go b/base62json.go
index 6d955e2..1629e59 100644
--- a/base62json.go
+++ b/base62json.go
@@ -23,7 +23,7 @@ func init() {
 func GenerateProjectSecret(key, secret string) ([]byte, error) {
 	appSecret := lo.FindUniques([]byte(secret))
 
-	if len(appSecret) != 62 {
+	if len(secret) != 62 {
 		return nil, fmt.Errorf("Invalid secret")
 	}
 
@@ -35,7 +35,7 @@ func GenerateProjectSecret(key, secret string) ([]byte, error) {
 }
 
 func SetCharacters(secret string) error {
-	if len(secret) != 64 {
+	if len(secret) != 62 {
 		return fmt.Errorf("encoding alphabet is not 62-bytes long")
 	}
 	bs62 = base62.NewEncoding(secret)
diff --git a/base62json_test.go b/base62json_test.go
index 1d5ac6c..e4d38f8 100644
--- a/base62json_test.go
+++ b/base62json_test.go
@@ -41,7 +41,7 @@ func TestGenerateProjectSecret(t *testing.T) {
 	// PrV4uZRqFHWOjkYIo07J1wdU6cDyXzh5Asi2xb3QMCNSmEvLl8pgetBGfnT9aK 加密后
 
 	// PrV4uZReFpWOjkYIoNCJ1wdU6cDyXzh5Asi2xb3QM70SmEvLl8HgqtBGfnT9aK
-	res, _ := GenerateProjectSecret("demo", "PrV4uZReFpWOjkYIoNCJ1wdU6cDyXzh5Asi2xb3QM70SmEvLl8HgqtBGfnT9aK")
+	res, _ := GenerateProjectSecret("demo", "PrV4uZRqFHWOjkYIo07J1wdU6cDyXzh5Asi2xb3QMCNSmEvLl8pgetBGfnT9aK")
 	t.Log(string(res))
 
 	res1, _ := GenerateProjectSecret("demo", "PrV4uZRqFHWOjkYIo07J1wdU6cDyXzh5Asi2xb3QMCNSmEvLl8pgetBGfnT9aK")
@@ -50,3 +50,8 @@ func TestGenerateProjectSecret(t *testing.T) {
 	// PrV4uZRqFHWOjkYIo07J1wdU6cDyXzh5Asi2xb3QMCNSmEvLl8pgetBGfnT9aK
 	// PrV4uZReFpWOjkYIoNCJ1wdU6cDyXzh5Asi2xb3QM70SmEvLl8HgqtBGfnT9aK
 }
+
+func TestAlphabetEncode(t *testing.T) {
+	t.Log(SetCharacters("PrV4uZRqFHWOjkYIo07J1wdU6cDyXzh5Asi2xb3QMCNSmEvLl8pgetBGfnT9aK"))
+	t.Log(Encode(map[string]any{"isDebug": 1}))
+}