diff --git a/README.md b/README.md
index 2c2844d..5be795c 100644
--- a/README.md
+++ b/README.md
@@ -147,7 +147,7 @@ func Md5File(filename string) (string, error) //return the md5 value of file
 func Sha1(data string) string //get sha1 value
 func Sha256(data string) string //getsha256 value
 func Sha512(data string) string //get sha512 value
-func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) //generate RSA pem file
+func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error //generate RSA pem file
 func RsaEncrypt(data []byte, pubKeyFileName string) []byte //RSA encrypt
 func RsaDecrypt(data []byte, privateKeyFileName string) []byte //RSA decrypt
 
diff --git a/README_zh-CN.md b/README_zh-CN.md
index 97b6474..86ca0ac 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -147,7 +147,7 @@ func Md5File(filename string) (string, error) //获取文件md5值
 func Sha1(data string) string //获取sha1值
 func Sha256(data string) string //获取sha256值
 func Sha512(data string) string //获取sha512值
-func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) //生成RSA私钥文件
+func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error //生成RSA私钥文件
 func RsaEncrypt(data []byte, pubKeyFileName string) []byte //RSA加密
 func RsaDecrypt(data []byte, privateKeyFileName string) []byte //RSA解密
 
diff --git a/cryptor/rsa.go b/cryptor/rsa.go
index ae3e22c..4b8440a 100644
--- a/cryptor/rsa.go
+++ b/cryptor/rsa.go
@@ -14,11 +14,11 @@ import (
 
 // GenerateRsaKey make  a rsa private key, and return key file name
 // Generated key file is `rsa_private.pem` and `rsa_public.pem` in current path
-func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) {
+func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error {
 	// private key
 	privateKey, err := rsa.GenerateKey(rand.Reader, keySize)
 	if err != nil {
-		panic(err)
+		return err
 	}
 
 	derText := x509.MarshalPKCS1PrivateKey(privateKey)
@@ -41,7 +41,7 @@ func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) {
 
 	derpText, err := x509.MarshalPKIXPublicKey(&publicKey)
 	if err != nil {
-		panic(err)
+		return err
 	}
 
 	block = pem.Block{
@@ -52,10 +52,12 @@ func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) {
 	//file,err = os.Create("rsa_public.pem")
 	file, err = os.Create(pubKeyFile)
 	if err != nil {
-		panic(err)
+		return err
 	}
 	pem.Encode(file, &block)
 	file.Close()
+
+	return nil
 }
 
 // RsaEncrypt encrypt data with ras algorithm
diff --git a/cryptor/rsa_test.go b/cryptor/rsa_test.go
index 8ed2a34..1a87c84 100644
--- a/cryptor/rsa_test.go
+++ b/cryptor/rsa_test.go
@@ -7,7 +7,10 @@ import (
 )
 
 func TestRsaEncrypt(t *testing.T) {
-	GenerateRsaKey(4096, "rsa_private.pem", "rsa_public.pem")
+	err := GenerateRsaKey(4096, "rsa_private.pem", "rsa_public.pem")
+	if err != nil {
+		t.FailNow()
+	}
 	data := []byte("hello world")
 	encrypted := RsaEncrypt(data, "rsa_public.pem")
 	decrypted := RsaDecrypt(encrypted, "rsa_private.pem")