diff --git a/searx/static/themes/simple/package.json b/searx/static/themes/simple/package.json
index e84489947..47cddf031 100644
--- a/searx/static/themes/simple/package.json
+++ b/searx/static/themes/simple/package.json
@@ -1,20 +1,23 @@
 {
   "devDependencies": {
-    "grunt": "~1.0.3",
+    "grunt-cli": "^1.4.3",
+    "grunt": "~1.4.1",
     "grunt-contrib-concat": "~1.0.1",
-    "grunt-contrib-cssmin": "^2.2.1",
-    "grunt-contrib-jshint": "~1.1.0",
+    "grunt-contrib-cssmin": "^4.0.0",
+    "grunt-contrib-jshint": "~3.0.0",
     "grunt-contrib-less": "~3.0.0",
-    "grunt-contrib-uglify": "~3.4.0",
+    "grunt-contrib-uglify": "~5.0.1",
     "grunt-contrib-watch": "~1.1.0",
-    "grunt-webfont": "^1.7.1",
+    "grunt-webfont": "^1.7.2",
     "ionicons-npm": "^2.0.1",
-    "jslint": "^0.12.0",
+    "jslint": "^0.12.1",
+    "less": "^4.1.1",
     "less-plugin-clean-css": "^1.5.1"
   },
   "scripts": {
     "build": "npm install && grunt",
     "start": "grunt watch",
     "test": "grunt"
-  }
+  },
+  "dependencies": {}
 }