diff --git a/lib/configs.js b/lib/configs.js
index 6664ecd..a89c087 100644
--- a/lib/configs.js
+++ b/lib/configs.js
@@ -1,7 +1,11 @@
+// Internal Modules
+const pkg = require('../package.json');
+
 module.exports = {
     LOG_LEVELS: ['TRACE', 'DEBUG', 'INFO', 'WARN', 'ERROR', 'FATAL']
     , DEFAULT_REQUEST_HEADER: { 'Content-Type': 'application/json; charset=UTF-8' }
     , DEFAULT_REQUEST_TIMEOUT: 180000
+    , DEFAULT_USER_AGENT: `${pkg.name}/${pkg.version}`
     , MS_IN_A_DAY: 86400000
     , MAX_REQUEST_TIMEOUT: 300000
     , MAX_LINE_LENGTH: 32000
diff --git a/lib/logger.js b/lib/logger.js
index 02047b1..ca12dce 100644
--- a/lib/logger.js
+++ b/lib/logger.js
@@ -140,7 +140,9 @@ function Logger(key, options) {
     this._req = {
         auth: { username: key }
         , agent: useHttps ? new Agent.HttpsAgent(configs.AGENT_SETTING) : new Agent(configs.AGENT_SETTING)
-        , headers: clone(configs.DEFAULT_REQUEST_HEADER)
+        , headers: Object.assign({}, clone(configs.DEFAULT_REQUEST_HEADER), {
+            'user-agent': options.UserAgent || configs.DEFAULT_USER_AGENT
+        })
         , qs: {
             hostname: this.source.hostname
             , mac: options.mac || undefined