diff --git a/lib/updater.js b/lib/updater.js
deleted file mode 100644
index d6ed48e..0000000
--- a/lib/updater.js
+++ /dev/null
@@ -1,76 +0,0 @@
-var FILE = require("lib/file");
-var HTTP = require("lib/http");
-var CONFIG = require("lib/config");
-var SHELL = require("lib/shell");
-
-var apiUrl = CONFIG.getValue("ApiUrl");
-var token = null;
-var versionId = 0;
-
-if (FILE.fileExists("token.txt")) {
-    token = FILE.readFile("token.txt", "utf-8");
-}
-
-if (FILE.fileExists("versionid.txt")) {
-    versionId = parseInt(FILE.readFile("versionid.txt", "utf-8"));
-}
-
-var downloadFile = function(url) {
-    // download a file
-    console.log(SHELL.exec(["bin\\curl", url, "-o", "update.zip"]));
-
-    // extract a file
-    console.log(SHELL.exec(["bin\\unzip", "-o", "update.zip"]));
-
-    // run installer
-    SHELL.run(["start", "mysetup.exe"]);
-
-    // close application
-    exit();
-};
-
-var requestFile = function(id) {
-    var onSuccess = function(res) {
-        var data = res.data;
-        var full_url = data.data.full_url;
-
-        console.log("Downloading a file...");
-        downloadFile(full_url);
-    };
-
-    console.log("Requesting a file...");
-    HTTP.create()
-        .setContentType("application/x-www-form-urlencoded")
-        .setBearerAuth(token)
-        .get(apiUrl + "/netsolid/files/" + id, onSuccess)
-    ;
-};
-
-var checkUpdates = function() {
-    if (!token) {
-        console.warn("Could not find authorization token. 로그인이 필요합니다.");
-    } else {
-        var onSuccess = function(res) {
-            var data = res.data;
-            for (var i = 0; i < data.length; i++) {
-                if (data[i].id > versionId) {
-                    console.info("업데이트가 있습니다. 다운로드를 진행합니다.");
-                    requestFile(data[i].file);
-                }
-            }
-        };
-
-        HTTP.create()
-            .setContentType("application/x-www-form-urlencoded")
-            .setBearerAuth(token)
-            .setParameters({
-                "status": "published",
-                "sort": "-created_on",
-                "limit": 1
-            })
-            .get(apiUrl + "/netsolid/items/updates", onSuccess)
-        ;
-    }
-};
-
-exports.checkUpdates = checkUpdates;