diff --git a/README.md b/README.md
index 1d10615..2c2844d 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ func StructToMap(value interface{}) (map[string]interface{}, error) //convert st
 
 ### 2. cryptor is for data encryption and decryption
 
-- Support md5, hmac, aes, des, ras.
+- Support md5, hmac, aes, des, rsa.
 - Usage: import "github.com/duke-git/lancet/cryptor"
 
 ```go
diff --git a/README_zh-CN.md b/README_zh-CN.md
index 6c65093..97b6474 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -96,7 +96,7 @@ func StructToMap(value interface{}) (map[string]interface{}, error) //struct串
 
 ### 2. cryptor加解密包
 
-- 加密函数支持md5, hmac, aes, des, ras
+- 加密函数支持md5, hmac, aes, des, rsa
 - 导入包：import "github.com/duke-git/lancet/cryptor"
 
 ```go