diff --git a/package.json b/package.json
index d97a9c26aa3..7614beb36a3 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "description": "Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.",
   "dependencies": {
     "acorn": "^3.2.0",
-    "async": "^1.3.0",
+    "async": "^3.2.2",
     "clone": "^1.0.2",
     "enhanced-resolve": "^2.2.0",
     "interpret": "^1.0.0",
@@ -18,7 +18,7 @@
     "source-map": "^0.5.3",
     "supports-color": "^3.1.0",
     "tapable": "~0.2.3",
-    "uglify-js": "~2.6.0",
+    "uglify-js": "~2.8.6",
     "watchpack": "^1.0.0",
     "webpack-sources": "^0.1.0",
     "yargs": "^4.7.1"