diff --git a/mixio.js b/mixio.js
index 5bc8793..ce355e0 100644
--- a/mixio.js
+++ b/mixio.js
@@ -98,7 +98,7 @@ var readline = require('readline');
 var iconv = require('iconv-lite');
 var request = require('request');
 const cors = require('cors');
-var syncRequest = require('sync-request');
+const axios = require('axios');
 var globalQPSControl = {}
 
 function init(cb){
@@ -588,24 +588,23 @@ async function daemon_start() {
     })
 }
 
-var mixioServer = function() {
+var mixioServer = async function() {
     var keyPath = HTTPS_PRIVATE_PEM
     var crtPath = HTTPS_CRT_FILE
     var privateKey = ""
     var certificate = ""
-    // if keyPath and crtPath are http/https, first download to configs/certs/
-    var privateKeyFileName = keyPath.split("/").pop()
-    var crtFileName = crtPath.split("/").pop()
     if (keyPath.indexOf("http") == 0) {
-        console.log("[INFO] Downloading private key from", keyPath)
-        var filePath = "config/certs/" + privateKeyFileName
-        // 如果存在就覆盖
-        if (fs.existsSync(filePath)) {
-            fs.unlinkSync(filePath)
-        }
-        // 下载文件
         try{
-            var body = syncRequest('GET', keyPath).getBody()
+            var privateKeyFileName = keyPath.split("/").pop()
+            console.log("[INFO] Downloading private key from", keyPath)
+            var filePath = "config/certs/" + privateKeyFileName
+            // 如果存在就覆盖
+            if (fs.existsSync(filePath)) {
+                fs.unlinkSync(filePath)
+            }
+            // 下载文件
+            var resp = await axios.get(keyPath)
+            body = resp.data
             // 不存在就创建
             fs.writeFileSync(filePath, body, 'utf8')
             privateKey = fs.readFileSync(filePath, 'utf8')
@@ -626,13 +625,15 @@ var mixioServer = function() {
         }
     }
     if (crtPath.indexOf("http") == 0) {
-        console.log("[INFO] Downloading certificate from", crtPath)
-        var filePath = "config/certs/" + crtFileName
-        if (fs.existsSync(filePath)) {
-            fs.unlinkSync(filePath)
-        }
         try{
-            var body = syncRequest('GET', crtPath).getBody()
+            var crtFileName = crtPath.split("/").pop()
+            console.log("[INFO] Downloading certificate from", crtPath)
+            var filePath = "config/certs/" + crtFileName
+            if (fs.existsSync(filePath)) {
+                fs.unlinkSync(filePath)
+            }
+            var resp = await axios.get(crtPath)
+            body = resp.data
             fs.writeFileSync(filePath, body, 'utf8')
             certificate = fs.readFileSync(filePath, 'utf8')
             console.log("[INFO] Certificate downloaded to", filePath)
diff --git a/package-lock.json b/package-lock.json
index 196b839..7c2d54a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
       "version": "1.10.0",
       "dependencies": {
         "aedes": "^0.51.3",
+        "axios": "^0.27.0",
         "cors": "^2.8.5",
         "ejs": "^3.1.10",
         "express": "^4.21.2",
@@ -852,6 +853,16 @@
       "integrity": "sha512-lHe62zvbTB5eEABUVi/AwVh0ZKY9rMMDhmm+eeyuuUQbQ3+J+fONVQOZyj+DdrvD4BY33uYniyRJ4UJIaSKAfw==",
       "license": "MIT"
     },
+    "node_modules/axios": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-0.27.0.tgz",
+      "integrity": "sha512-XV/WrPxXfzgZ8j4lcB5i6LyaXmi90yetmV/Fem0kmglGx+mpY06CiweL3YxU6wOTNLmqLUePW4G8h45nGZ/+pA==",
+      "deprecated": "Formdata complete broken, incorrect build size",
+      "dependencies": {
+        "follow-redirects": "^1.14.9",
+        "form-data": "^4.0.0"
+      }
+    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -2300,6 +2311,25 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/follow-redirects": {
+      "version": "1.15.9",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.9.tgz",
+      "integrity": "sha512-gew4GsXizNgdoRyqmyfMHyAmXsZDk6mHkSxZFCzW9gwlbtOW44CDtYavM+y+72qD/Vq2l550kMF52DT8fOLJqQ==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://github.com/sponsors/RubenVerborgh"
+        }
+      ],
+      "engines": {
+        "node": ">=4.0"
+      },
+      "peerDependenciesMeta": {
+        "debug": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/for-in": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/for-in/-/for-in-1.0.2.tgz",
diff --git a/package.json b/package.json
index d3befdb..984e724 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,7 @@
 {
   "dependencies": {
     "aedes": "^0.51.3",
+    "axios": "^0.27.0",
     "cors": "^2.8.5",
     "ejs": "^3.1.10",
     "express": "^4.21.2",