diff --git a/package-lock.json b/package-lock.json
index 8cbcd0c..4d871fe 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "rats-search",
-  "version": "0.4.0",
+  "version": "0.5.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -4190,6 +4190,11 @@
       "resolved": "https://registry.npmjs.org/electron-is-dev/-/electron-is-dev-0.3.0.tgz",
       "integrity": "sha1-FOb9pcaOnk7L7/nM8DfL18BcWv4="
     },
+    "electron-log": {
+      "version": "2.2.14",
+      "resolved": "https://registry.npmjs.org/electron-log/-/electron-log-2.2.14.tgz",
+      "integrity": "sha512-Rj+XyK4nShe/nv9v1Uks4KEfjtQ6N+eSnx5CLpAjG6rlyUdAflyFHoybcHSLoq9l9pGavclULWS5IXgk8umc2g=="
+    },
     "electron-osx-sign": {
       "version": "0.4.8",
       "resolved": "https://registry.npmjs.org/electron-osx-sign/-/electron-osx-sign-0.4.8.tgz",
@@ -5369,8 +5374,7 @@
         "jsbn": {
           "version": "0.1.1",
           "bundled": true,
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "json-schema": {
           "version": "0.2.3",
diff --git a/package.json b/package.json
index ae953a7..c1ace1f 100644
--- a/package.json
+++ b/package.json
@@ -81,6 +81,7 @@
     "debug": "^3.1.0",
     "diskusage": "^0.2.4",
     "electron-context-menu": "^0.9.1",
+    "electron-log": "^2.2.14",
     "electron-updater": "^2.20.1",
     "fs-jetpack": "^1.2.0",
     "iconv-lite": "^0.4.19",
diff --git a/src/background/background.js b/src/background/background.js
index 36b443f..806c63e 100644
--- a/src/background/background.js
+++ b/src/background/background.js
@@ -57,7 +57,8 @@ const logFile = fs.createWriteStream(app.getPath("userData") + '/rats.log', {fla
 const logStdout = process.stdout;
 
 console.log = (...d) => {
-  logFile.write(util.format(...d) + '\n');
+  const date = (new Date).toLocaleTimeString()
+  logFile.write(`[${date}] ` + util.format(...d) + '\n');
   logStdout.write(util.format(...d) + '\n');
 };
 
@@ -232,6 +233,16 @@ const startSphinx = (callback) => {
   }
 }
 
+// log autoupdate
+const log = require('electron-log')
+log.transports.file.level = false;
+log.transports.console.level = false;
+log.transports.console = function(msg) {
+  const text = util.format.apply(util, msg.data);
+  console.log(text);
+};
+autoUpdater.logger = log;
+
 autoUpdater.on('update-downloaded', () => {
   console.log('update-downloaded lats quitAndInstall');
   if (env.name === "production") {