diff --git a/lib/server/config.js b/lib/server/config.js
index f4c29ead..c45bc302 100644
--- a/lib/server/config.js
+++ b/lib/server/config.js
@@ -15,7 +15,7 @@
         
         Util        = require(DIR_LIB       + 'util'),
         CloudFunc   = require(DIR_LIB       + 'cloudfunc'),
-        check       = Util.check,
+        check       = require('checkup'),
         
         tryRequire  = require('tryrequire'),
         
diff --git a/lib/server/rest.js b/lib/server/rest.js
index 5937181a..f0e5e4b0 100644
--- a/lib/server/rest.js
+++ b/lib/server/rest.js
@@ -30,6 +30,7 @@
         rendy       = require('rendy'),
         copymitter  = require('copymitter'),
         tryCatch    = require('try-catch'),
+        check       = require('checkup'),
         
         Modules     = require(DIR_JSON + 'modules'),
         
@@ -69,7 +70,7 @@
                 response    : response
             };
         
-        Util.check(arguments, ['request', 'response', 'next']);
+        check(arguments, ['request', 'response', 'next']);
         
         apiURL  = CloudFunc.apiURL;
         name    = ponse.getPathName(request);
@@ -188,7 +189,7 @@
     function onPUT(name, body, callback) {
         var cmd, files, data, from, to, error, msg;
         
-        Util.check(arguments, ['name', 'body', 'callback']);
+        check(arguments, ['name', 'body', 'callback']);
         
         if (name[0] === '/')
             cmd = name.replace('/', '');
@@ -359,7 +360,7 @@
                     });
             };
         
-        Util.check(arguments, ['files', 'processFunc', 'callback']);
+        check(arguments, ['files', 'processFunc', 'callback']);
         
         copy();
     }
@@ -382,7 +383,7 @@
     
     function formatMsg(msgParam, dataParam, status) {
         var msg, data,
-            isObj = Util.type.object(dataParam);
+            isObj = typeof dataParam === 'object';
         
         if (isObj)
             data = json.stringify(dataParam);
diff --git a/lib/server/route.js b/lib/server/route.js
index a1b43e20..9f78ba5e 100644
--- a/lib/server/route.js
+++ b/lib/server/route.js
@@ -17,10 +17,10 @@
         
         minify      = require('minify'),
         format      = require('format-io'),
+        check       = require('checkup'),
         
         config      = require(DIR_SERVER + 'config'),
         
-        Util        = require(DIR_LIB + 'util'),
         CloudFunc   = require(DIR_LIB + 'cloudfunc'),
         
         PATH_INDEX  = DIR_FS   + 'index.html',
@@ -94,7 +94,7 @@
             lenthPath   = TMPL_PATH.length,
             isRead      = lengthTmpl === lenthPath;
         
-        Util.check(arguments, ['callback']);
+        check(arguments, ['callback']);
         
         if (isRead) {
             callback();
@@ -128,7 +128,7 @@
     function route(request, response, callback) {
         var name, p, isAuth, isFS, path;
         
-        Util.check(arguments, ['req', 'res', 'callback']);
+        check(arguments, ['req', 'res', 'callback']);
         
         name    = ponse.getPathName(request);
         isAuth  = RegExp('^(/auth|/auth/github)$').test(name);
diff --git a/package.json b/package.json
index 4987d9ae..e0c1a25e 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
   "subdomain": "cloudcmd",
   "dependencies": {
     "ashify": "~1.0.0",
+    "checkup": "~1.0.3",
     "console-io": "~2.2.0",
     "copymitter": "~1.5.0",
     "dword": "~1.3.2",