diff --git a/web-server/app/middleware/parmsDecode.ts b/web-server/app/middleware/parmsDecode.ts
index 98f363339..3e620b532 100644
--- a/web-server/app/middleware/parmsDecode.ts
+++ b/web-server/app/middleware/parmsDecode.ts
@@ -24,8 +24,8 @@ function aesDecrypt(data, key, iv) {
 
 function privateDecrypt(encryptMsg) {
   const decryptMsg = crypto.privateDecrypt(
-      privateKey,
-      encryptMsg
+    { key: privateKey, padding: crypto.constants.RSA_PKCS1_PADDING },
+    encryptMsg
   );
   return decryptMsg;
 }
@@ -43,8 +43,8 @@ module.exports = options => {
 
 
     const reqHeader = ctx.request.header;
-    const aesKey = reqHeader['k'] ? privateDecrypt(Buffer.from(reqHeader['k'], 'base64')) : ENCRYPT_KEY;
-    const aesIV = reqHeader['v'] ? privateDecrypt(Buffer.from(reqHeader['v'], 'base64')) : ENCRYPT_IV;
+    const aesKey = reqHeader['k'] ? privateDecrypt(new Buffer(reqHeader['k'], 'base64')) : ENCRYPT_KEY;
+    const aesIV = reqHeader['v'] ? privateDecrypt(new Buffer(reqHeader['v'], 'base64')) : ENCRYPT_IV;
 
     if (isJSON(reqBody)) {
       const encodeStr = aesEncrypt(JSON.stringify(reqBody), aesKey, aesIV);