diff --git a/app/services/apicrypt/rsa.go b/app/services/apicrypt/rsa.go
index 0a90d7f..dcb2595 100644
--- a/app/services/apicrypt/rsa.go
+++ b/app/services/apicrypt/rsa.go
@@ -14,11 +14,11 @@ func NewRsa(app *appmodel.App) ApiCrypt {
 }
 
 func (r *Rsa) Encrypt(data string) (encryptData []byte, errCode int) {
-	if r.App.PublicKey == "" {
+	if r.App.MerchantPublicKey == "" {
 		return nil, errorcode.AppRsaEncryptKeyNotFound
 	}
 	publicKeyPEM := `-----BEGIN PUBLIC KEY-----  
-` + r.App.PublicKey + `  
+` + r.App.MerchantPublicKey + `  
 -----END PUBLIC KEY-----`
 	encryptByte, err := rsa.Encrypt(publicKeyPEM, data)
 	if err != nil {