diff --git a/package.json b/package.json
index 9d6d837868ad3..6581d3dae05ee 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   },
   "main": "index.js",
   "dependencies": {
-    "async": "0.9.0",
+    "async": "3.2.2",
     "atob": "1.1.2",
     "autoprefixer": "4.0.0",
     "autosize": "3.0.7",
@@ -90,9 +90,9 @@
     "to-title-case": "0.1.5",
     "tween.js": "16.3.1",
     "twemoji": "1.3.2",
-    "uglify-js": "2.6.1",
+    "uglify-js": "2.8.6",
     "walk": "2.3.4",
-    "webpack": "1.12.6",
+    "webpack": "4.0.0",
     "webpack-dev-middleware": "1.2.0",
     "wpcom-proxy-request": "1.0.5",
     "wpcom-unpublished": "1.0.8",