diff --git a/README.md b/README.md
index 5e49f2e..938ba71 100644
--- a/README.md
+++ b/README.md
@@ -179,6 +179,7 @@ There are some config settings you need to change in the files below.
 | `CMD_HOST` | `localhost` | host to listen on |
 | `CMD_PORT` | `80` | web app port |
 | `CMD_PATH` | `/var/run/codimd.sock` | path to UNIX domain socket to listen on (if specified, `CMD_HOST` and `CMD_PORT` are ignored) |
+| `CMD_LOGLEVEL` | `info` | Defines what kind of logs are provided to stdout. |
 | `CMD_ALLOW_ORIGIN` | `localhost, codimd.org` | domain name whitelist (use comma to separate) |
 | `CMD_PROTOCOL_USESSL` | `true` or `false` | set to use SSL protocol for resources path (only applied when domain is set) |
 | `CMD_URL_ADDPORT` | `true` or `false` | set to add port on callback URL (ports `80` or `443` won't be applied) (only applied when domain is set) |
@@ -274,6 +275,7 @@ There are some config settings you need to change in the files below.
 | `host` | `localhost` | host to listen on |
 | `port` | `80` | web app port |
 | `path` | `/var/run/codimd.sock` | path to UNIX domain socket to listen on (if specified, `host` and `port` are ignored) |
+| `loglevel` | `info` | Defines what kind of logs are provided to stdout. |
 | `allowOrigin` | `['localhost']` | domain name whitelist |
 | `useSSL` | `true` or `false` | set to use SSL server (if `true`, will auto turn on `protocolUseSSL`) |
 | `hsts` | `{"enable": true, "maxAgeSeconds": 31536000, "includeSubdomains": true, "preload": true}` | [HSTS](https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security) options to use with HTTPS (default is the example value, max age is a year) |
diff --git a/config.json.example b/config.json.example
index 16c9550..8965add 100644
--- a/config.json.example
+++ b/config.json.example
@@ -6,6 +6,7 @@
         }
     },
     "development": {
+        "loglevel": "debug",
         "hsts": {
             "enable": false
         },
@@ -16,6 +17,7 @@
     },
     "production": {
         "domain": "localhost",
+        "loglevel": "info"
         "hsts": {
             "enable": true,
             "maxAgeSeconds": "31536000",
diff --git a/lib/config/default.js b/lib/config/default.js
index 15f11aa..71375b9 100644
--- a/lib/config/default.js
+++ b/lib/config/default.js
@@ -7,6 +7,7 @@ module.exports = {
   urlPath: '',
   host: '0.0.0.0',
   port: 3000,
+  loglevel: 'info',
   urlAddPort: false,
   allowOrigin: ['localhost'],
   useSSL: false,
diff --git a/lib/config/environment.js b/lib/config/environment.js
index 0c7c9a4..4220e54 100644
--- a/lib/config/environment.js
+++ b/lib/config/environment.js
@@ -9,6 +9,7 @@ module.exports = {
   host: process.env.CMD_HOST,
   port: toIntegerConfig(process.env.CMD_PORT),
   path: process.env.CMD_PATH,
+  loglevel: process.env.CMD_LOGLEVEL,
   urlAddPort: toBooleanConfig(process.env.CMD_URL_ADDPORT),
   useSSL: toBooleanConfig(process.env.CMD_USESSL),
   hsts: {
diff --git a/lib/config/index.js b/lib/config/index.js
index 4e1fa50..c1005b0 100644
--- a/lib/config/index.js
+++ b/lib/config/index.js
@@ -45,6 +45,12 @@ merge(config, require('./hackmdEnvironment'))
 merge(config, require('./environment'))
 merge(config, require('./dockerSecret'))
 
+if (['debug', 'verbose', 'info', 'warn', 'error'].includes(config.loglevel)) {
+  logger.level = config.loglevel
+} else {
+  logger.error('Selected loglevel %s doesn\'t exist, using default level \'debug\'. Available options: debug, verbose, info, warn, error', config.loglevel)
+}
+
 // load LDAP CA
 if (config.ldap.tlsca) {
   let ca = config.ldap.tlsca.split(',')
diff --git a/lib/logger.js b/lib/logger.js
index f8b3895..c70b81b 100644
--- a/lib/logger.js
+++ b/lib/logger.js
@@ -1,23 +1,19 @@
 'use strict'
-const winston = require('winston')
+const {createLogger, format, transports} = require('winston')
 
-class Logger extends winston.Logger {
-  // Implement stream.writable.write interface
-  write (chunk) {
-    this.info(chunk)
-  }
-}
-
-module.exports = new Logger({
+module.exports = createLogger({
+  level: 'debug',
+  format: format.combine(
+    format.uncolorize(),
+    format.timestamp(),
+    format.align(),
+    format.splat(),
+    format.printf(info => `${info.timestamp} ${info.level}: ${info.message}`)
+  ),
   transports: [
-    new winston.transports.Console({
-      level: 'debug',
-      handleExceptions: true,
-      json: false,
-      colorize: false,
-      timestamp: true
+    new transports.Console({
+      handleExceptions: true
     })
   ],
-  emitErrs: true,
   exitOnError: false
 })
diff --git a/package.json b/package.json
index 304a526..cd875ac 100644
--- a/package.json
+++ b/package.json
@@ -129,7 +129,7 @@
     "velocity-animate": "^1.4.0",
     "visibilityjs": "^1.2.4",
     "viz.js": "^1.7.0",
-    "winston": "^2.3.0",
+    "winston": "^3.1.0",
     "ws": "^6.0.0",
     "xss": "^1.0.3"
   },