diff --git a/alipay/sign.go b/alipay/sign.go
index 0dae68b1..a8dd3905 100644
--- a/alipay/sign.go
+++ b/alipay/sign.go
@@ -205,36 +205,6 @@ func (a *Client) getRsaSign(bm gopay.BodyMap, signType string) (sign string, err
 	return
 }
 
-func (a *Client) getStrRsaSign(signParams string, signType string) (sign string, err error) {
-	var (
-		h              hash.Hash
-		hashs          crypto.Hash
-		encryptedBytes []byte
-	)
-	switch signType {
-	case RSA:
-		h = sha1.New()
-		hashs = crypto.SHA1
-	case RSA2:
-		h = sha256.New()
-		hashs = crypto.SHA256
-	default:
-		h = sha256.New()
-		hashs = crypto.SHA256
-	}
-	if a.DebugSwitch == gopay.DebugOn {
-		xlog.Debugf("Alipay_Request_SignStr: %s", signParams)
-	}
-	if _, err = h.Write([]byte(signParams)); err != nil {
-		return
-	}
-	if encryptedBytes, err = rsa.SignPKCS1v15(rand.Reader, a.privateKey, hashs, h.Sum(nil)); err != nil {
-		return util.NULL, fmt.Errorf("[%w]: %+v", gopay.SignatureErr, err)
-	}
-	sign = base64.StdEncoding.EncodeToString(encryptedBytes)
-	return
-}
-
 // =============================== 获取SignData ===============================
 
 // 需注意的是，公钥签名模式和公钥证书签名模式的不同之处
diff --git a/constant.go b/constant.go
index 5417ffab..197a5fa5 100644
--- a/constant.go
+++ b/constant.go
@@ -7,7 +7,7 @@ const (
 	OK       = "OK"
 	DebugOff = 0
 	DebugOn  = 1
-	Version  = "1.5.97"
+	Version  = "1.5.98"
 )
 
 type DebugSwitch int8
diff --git a/go.mod b/go.mod
index 812597d5..d33ce164 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/go-pay/gopay
 
 go 1.18
 
-require golang.org/x/crypto v0.14.0
+require golang.org/x/crypto v0.15.0
diff --git a/go.sum b/go.sum
index 886a2369..fcac726f 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-golang.org/x/crypto v0.14.0 h1:wBqGXzWJW6m1XrIKlAH0Hs1JJ7+9KBwnIO8v66Q9cHc=
-golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
+golang.org/x/crypto v0.15.0 h1:frVn1TEaCEaZcn3Tmd7Y2b5KKPaZ+I32Q2OA3kYp5TA=
+golang.org/x/crypto v0.15.0/go.mod h1:4ChreQoLWfG3xLDer1WdlH5NdlQ3+mwnQq1YTKY+72g=
diff --git a/release_note.txt b/release_note.txt
index 7881068e..0022cd86 100644
--- a/release_note.txt
+++ b/release_note.txt
@@ -2,7 +2,7 @@
 修改记录：
    (1) 支付宝：PR新增 client.PostFileAliPayAPISelfV2()，文件上传自定义方法（未做验证，不知道是否好用）。
    (2) Apple：更新部分结构体字段。
-   (3)
+   (3) PayPal：增加Token的自动刷新功能。
 
 版本号：Release 1.5.97
 修改记录：