diff --git a/README.md b/README.md
index 1d34a58..7257936 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@

-[](https://github.com/duke-git/lancet/releases)
+[](https://github.com/duke-git/lancet/releases)
[](https://pkg.go.dev/github.com/duke-git/lancet)
[](https://goreportcard.com/report/github.com/duke-git/lancet)
[](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
@@ -108,6 +108,7 @@ import "github.com/duke-git/lancet/convertor"
- [ToUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToUrlBase64)
- [ToRawStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToRawStdBase64)
- [ToRawUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToRawUrlBase64)
+- [ToBigInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToBigInt)
### 3. Cryptor package is for data encryption and decryption.
diff --git a/README_zh-CN.md b/README_zh-CN.md
index ba23a09..9298086 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -4,7 +4,7 @@

-[](https://github.com/duke-git/lancet/releases)
+[](https://github.com/duke-git/lancet/releases)
[](https://pkg.go.dev/github.com/duke-git/lancet)
[](https://goreportcard.com/report/github.com/duke-git/lancet)
[](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
@@ -107,6 +107,7 @@ import "github.com/duke-git/lancet/convertor"
- [ToUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToUrlBase64)
- [ToRawStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToRawStdBase64)
- [ToRawUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToRawUrlBase64)
+- [ToBigInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToBigInt)
### 3. cryptor 加密包支持数据加密和解密,获取 md5,hash 值。支持 base64, md5, hmac, aes, des, rsa。