diff --git a/package.json b/package.json
index 27c7938c..ff05ac9c 100644
--- a/package.json
+++ b/package.json
@@ -33,19 +33,19 @@
     "format": "grunt eslint --fix"
   },
   "devDependencies": {
-    "dateformat": "4.5.1",
+    "dateformat": "5.0.2",
     "fs-extra": "10.0.0",
     "grunt": "1.4.1",
     "grunt-casperjs": "^2.2.1",
     "grunt-cli": "^1.4.3",
     "grunt-contrib-clean": "2.0.0",
-    "grunt-contrib-concat": "1.0.1",
+    "grunt-contrib-concat": "2.0.0",
     "grunt-contrib-connect": "3.0.0",
     "grunt-contrib-copy": "1.0.0",
-    "grunt-contrib-jshint": "3.0.0",
+    "grunt-contrib-jshint": "3.1.1",
     "grunt-contrib-uglify": "5.0.1",
     "grunt-contrib-watch": "^1.1.0",
-    "grunt-eslint": "23.0.0",
+    "grunt-eslint": "24.0.0",
     "grunt-include-replace": "5.0.0",
     "grunt-jscs": "3.0.1",
     "grunt-karma": "4.0.2",
@@ -53,15 +53,15 @@
     "grunt-nw-builder": "3.1.0",
     "grunt-replace": "2.0.2",
     "grunt-spritesmith": "^6.9.0",
-    "jasmine-core": "3.8.0",
-    "karma": "6.3.4",
+    "jasmine-core": "4.0.0",
+    "karma": "6.3.11",
     "karma-jasmine": "4.0.1",
     "karma-phantomjs-launcher": "1.0.4",
     "load-grunt-tasks": "5.1.0",
-    "nw": "0.54.0",
+    "nw": "0.60.0",
     "phantomjs": "2.1.7",
     "phantomjs-polyfill-object-assign": "0.0.2",
-    "promise-polyfill": "8.2.0",
+    "promise-polyfill": "8.2.1",
     "rmdir": "1.2.0"
   },
   "window": {