diff --git a/Gruntfile.js b/Gruntfile.js
index 59566a8b32..4c51b28a5f 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -383,7 +383,9 @@ module.exports = function(grunt) {
         }
     });
 
-    grunt.loadNpmTasks("grunt-contrib");
+    grunt.loadNpmTasks('grunt-contrib-clean');
+    grunt.loadNpmTasks('grunt-contrib-copy');
+    grunt.loadNpmTasks('grunt-contrib-qunit');
     grunt.loadNpmTasks('grunt-shell');
     grunt.loadNpmTasks("grunt-bower-task");
     grunt.loadNpmTasks("grunt-bower-postinst");
diff --git a/package.json b/package.json
index c33783ffa8..c42b95d748 100644
--- a/package.json
+++ b/package.json
@@ -1,19 +1,21 @@
 {
-    "name": "phraseanet",
-    "version": "3.9.0",
-    "devDependencies": {
-        "bower": "~1.3",
-        "mocha-phantomjs": ">=2.0 <3.0",
-        "recess": ">=1.1.0 <1.1.7",
-        "tmp": "0.0.23",
-        "uglify-js": "latest",
-        "jake": "latest",
-        "grunt-cli": "latest",
-        "grunt": "~0.4.1",
-        "grunt-shell": "~0.6",
-        "grunt-contrib": "~0.4.0",
-        "grunt-bower-task": "~0.4.0",
-        "grunt-bower-postinst": "~0.2.0",
-        "grunt-mocha-phantomjs": "~0.3.0"
-    }
+  "name": "phraseanet",
+  "version": "3.9.0",
+  "devDependencies": {
+    "bower": "~1.3",
+    "grunt": "~0.4.1",
+    "grunt-bower-postinst": "~0.2.0",
+    "grunt-bower-task": "~0.4.0",
+    "grunt-cli": "latest",
+    "grunt-contrib-clean": "^0.6.0",
+    "grunt-contrib-copy": "^0.8.2",
+    "grunt-contrib-qunit": "^0.7.0",
+    "grunt-mocha-phantomjs": "~0.3.0",
+    "grunt-shell": "~0.6",
+    "jake": "latest",
+    "mocha-phantomjs": ">=2.0 <3.0",
+    "recess": ">=1.1.0 <1.1.7",
+    "tmp": "0.0.23",
+    "uglify-js": "latest"
+  }
 }