diff --git a/Gruntfile.js b/Gruntfile.js
index 32ad9fb1..56b076b1 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -79,7 +79,6 @@ module.exports = function(grunt) {
         browser : true,
         trailing : true,
         curly : true,
-        es3 : true,
         globals : {'$':true, 'jQuery' : true, 'pskl':true, 'Events':true, 'Constants':true, 'console' : true, 'module':true, 'require':true}
       },
       files: [
diff --git a/package.json b/package.json
index 71f35ee0..b917a4d2 100644
--- a/package.json
+++ b/package.json
@@ -14,27 +14,27 @@
     "start": "nodewebkit"
   },
   "devDependencies": {
-    "dateformat": "1.0.8-1.2.3",
+    "dateformat": "^1.0.11",
     "grunt": "~0.4.5",
-    "load-grunt-tasks": "^3.1.0",
-    "grunt-contrib-clean": "0.5.0",
-    "grunt-contrib-concat": "0.5.0",
-    "grunt-contrib-copy": "0.5.0",
-    "grunt-contrib-jshint": "0.10.0",
-    "grunt-contrib-uglify": "0.5.0",
+    "grunt-contrib-clean": "^0.6.0",
+    "grunt-contrib-concat": "^0.5.1",
+    "grunt-contrib-copy": "^0.8.0",
+    "grunt-contrib-jshint": "^0.11.1",
+    "grunt-contrib-uglify": "^0.9.1",
     "grunt-contrib-watch": "0.6.1",
     "grunt-express": "1.4.1",
     "grunt-ghost": "1.1.0",
-    "grunt-leading-indent": "0.1.0",
-    "grunt-node-webkit-builder": "0.1.21",
+    "grunt-karma": "^0.10.1",
+    "grunt-leading-indent": "^0.2.0",
+    "grunt-node-webkit-builder": "^1.0.2",
     "grunt-open": "0.2.3",
-    "grunt-replace": "0.7.8",
-    "grunt-karma": "~0.8.2",
-    "karma": "0.12.17",
+    "grunt-replace": "^0.8.0",
+    "karma": "0.12.31",
     "karma-chrome-launcher": "^0.1.4",
+    "karma-jasmine": "^0.3.5",
     "karma-phantomjs-launcher": "^0.1.4",
-    "karma-jasmine": "^0.2.0",
-    "nodewebkit": "~0.10.1"
+    "load-grunt-tasks": "^3.1.0",
+    "nodewebkit": "^0.11.6"
   },
   "window": {
     "title": "Piskel",
diff --git a/src/js/service/AppEngineStorageService.js b/src/js/service/AppEngineStorageService.js
index 4e51c08e..44df1a59 100644
--- a/src/js/service/AppEngineStorageService.js
+++ b/src/js/service/AppEngineStorageService.js
@@ -22,7 +22,7 @@
     };
 
     if (descriptor.isPublic) {
-      data['public'] = true;
+      data.public = true;
     }
 
     var success = function () {