diff --git a/package.json b/package.json
index 4f78087..d78240b 100644
--- a/package.json
+++ b/package.json
@@ -3,27 +3,27 @@
   "version": "0.0.0",
   "dependencies": {},
   "devDependencies": {
-    "grunt": "~0.4.1",
-    "grunt-contrib-copy": "~0.5.0",
-    "grunt-contrib-concat": "~0.3.0",
-    "grunt-contrib-uglify": "~0.4.0",
-    "grunt-contrib-jshint": "~0.9.2",
-    "grunt-contrib-cssmin": "~0.9.0",
-    "grunt-contrib-connect": "~0.7.1",
-    "grunt-contrib-clean": "~0.5.0",
-    "grunt-contrib-htmlmin": "~0.2.0",
-    "grunt-bower-install": "~1.0.0",
-    "grunt-contrib-imagemin": "~0.7.1",
-    "grunt-contrib-watch": "~0.6.1", 
-    "grunt-usemin": "~2.1.0", 
-    "grunt-mocha": "~0.4.10",
-    "grunt-svgmin": "~0.4.0",
-    "grunt-concurrent": "~0.5.0",
-    "load-grunt-tasks": "~0.4.0",
-    "time-grunt": "~0.3.1",
-    "jshint-stylish": "~0.1.5",
-    "grunt-chrome-manifest": "~0.2.0",
-    "grunt-contrib-compress": "~0.9.1"
+    "grunt": "0.4.5",
+    "grunt-contrib-copy": "0.5.0",
+    "grunt-contrib-concat": "0.3.0",
+    "grunt-contrib-uglify": "0.4.1",
+    "grunt-contrib-jshint": "0.9.2",
+    "grunt-contrib-cssmin": "0.9.0",
+    "grunt-contrib-connect": "0.7.1",
+    "grunt-contrib-clean": "0.5.0",
+    "grunt-contrib-htmlmin": "0.2.0",
+    "grunt-bower-install": "1.0.2",
+    "grunt-contrib-imagemin": "0.7.2",
+    "grunt-contrib-watch": "0.6.1", 
+    "grunt-usemin": "2.1.1", 
+    "grunt-mocha": "0.4.15",
+    "grunt-svgmin": "0.4.0",
+    "grunt-concurrent": "0.5.0",
+    "load-grunt-tasks": "0.4.0",
+    "time-grunt": "0.3.2",
+    "jshint-stylish": "0.1.5",
+    "grunt-chrome-manifest": "0.2.4",
+    "grunt-contrib-compress": "0.9.1"
   },
   "engines": {
     "node": ">=0.8.0"