diff --git a/package.json b/package.json
index 4897703..3441aba 100644
--- a/package.json
+++ b/package.json
@@ -28,33 +28,33 @@
     "firebase": "2.0.x"
   },
   "devDependencies": {
-    "chai": "~3.5.0",
+    "chai": "~4.1.2",
     "chai-backbone": "~0.9.4",
-    "coveralls": "^2.11.15",
+    "coveralls": "^3.0.0",
     "grunt": "~1.0.1",
     "grunt-cli": "1.2.0",
     "grunt-contrib-concat": "^1.0.1",
     "grunt-contrib-connect": "^1.0.2",
     "grunt-contrib-copy": "~1.0.0",
-    "grunt-contrib-jshint": "~1.0.0",
-    "grunt-contrib-uglify": "~2.0.0",
+    "grunt-contrib-jshint": "~1.1.0",
+    "grunt-contrib-uglify": "~3.1.0",
     "grunt-contrib-watch": "~1.0.0",
     "grunt-karma": "^2.0.0",
     "grunt-notify": "~0.4.5",
     "istanbul": "^0.4.5",
-    "karma": "~1.3.0",
+    "karma": "~1.7.1",
     "karma-chai": "0.1.0",
-    "karma-chrome-launcher": "^2.0.0",
+    "karma-chrome-launcher": "^2.2.0",
     "karma-coverage": "^1.1.1",
     "karma-failed-reporter": "0.0.3",
     "karma-mocha": "~1.3.0",
-    "karma-phantomjs-launcher": "~1.0.2",
+    "karma-phantomjs-launcher": "~1.0.4",
     "karma-requirejs": "~1.1.0",
     "karma-sinon": "~1.0.5",
-    "karma-spec-reporter": "0.0.26",
-    "mocha": "~3.1.2",
-    "requirejs": "~2.3.2",
-    "sinon" : "~1.17.6"
+    "karma-spec-reporter": "0.0.31",
+    "mocha": "~4.0.1",
+    "requirejs": "~2.3.5",
+    "sinon": "~4.1.2"
   },
   "scripts": {
     "test": "grunt test",