diff --git a/package.json b/package.json
index c3bed3f..1735506 100644
--- a/package.json
+++ b/package.json
@@ -39,8 +39,8 @@
 		"chai": "^4.1.2",
 		"connect": "^3.3.3",
 		"eslint": "^4.19.1",
-		"grunt": "^0.4.5",
-		"grunt-contrib-uglify": "^0.6.0",
+		"grunt": "^1.0.2",
+		"grunt-contrib-uglify": "^3.3.0",
 		"mocha": "^3.5.0",
 		"mocha-phantomjs": "^3.5.4",
 		"open": "0.0.5",