diff --git a/package.json b/package.json
index 4227261..9032e03 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "private": true,
   "devDependencies": {
     "coveralls": "^2.11.4",
-    "grunt": "^0.4.5",
+    "grunt": "0.4.5",
     "grunt-angular-architecture-graph": "^0.2.6",
     "grunt-angular-templates": "^0.5.7",
     "grunt-autoprefixer": "^2.0.0",
@@ -15,7 +15,7 @@
     "grunt-contrib-copy": "^0.7.0",
     "grunt-contrib-cssmin": "^0.12.0",
     "grunt-contrib-htmlmin": "^0.4.0",
-    "grunt-contrib-imagemin": "^0.9.2",
+    "grunt-contrib-imagemin": "2.0.0",
     "grunt-contrib-jshint": "^0.11.0",
     "grunt-contrib-uglify": "^0.11.1",
     "grunt-contrib-watch": "^0.6.1",