diff --git a/package.json b/package.json
index 07c2ae3..03aad7e 100644
--- a/package.json
+++ b/package.json
@@ -25,8 +25,8 @@
   "devDependencies": {
     "bower": ">=1.3.9",
     "grunt": "~0.4.5",
-    "grunt-autoprefixer": "~0.8.1",
-    "grunt-contrib-concat": "~0.4.0",
+    "grunt-autoprefixer": "~1.0.0",
+    "grunt-contrib-concat": "~0.5.0",
     "grunt-contrib-jshint": "~0.10.0",
     "grunt-contrib-less": "~0.11.3",
     "grunt-contrib-uglify": "~0.5.0",
@@ -34,6 +34,6 @@
     "grunt-modernizr": "~0.5.2",
     "grunt-wp-assets": "~0.2.6",
     "load-grunt-tasks": "~0.6.0",
-    "time-grunt": "~0.3.2"
+    "time-grunt": "~0.4.0"
   }
 }