diff --git a/package.json b/package.json
index 68ba32b2d..7f77b3be7 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "babel-core": "^6.2.1",
     "babel-loader": "^6.2.0",
     "babel-preset-es2015": "^6.1.18",
-    "copy-webpack-plugin": "^3.0.1",
+    "copy-webpack-plugin": "^4.0.1",
     "css-loader": "^0.23.0",
     "extract-text-webpack-plugin": "^1.0.1",
     "file-loader": "^0.9.0",
@@ -42,10 +42,10 @@
     "karma-sourcemap-loader": "^0.3.7",
     "karma-spec-reporter": "0.0.26",
     "karma-webpack": "^1.7.0",
-    "node-libs-browser": "^1.0.0",
+    "node-libs-browser": "^2.0.0",
     "null-loader": "^0.1.1",
     "phantomjs-prebuilt": "^2.1.4",
-    "postcss-loader": "^0.9.1",
+    "postcss-loader": "^1.1.1",
     "raw-loader": "^0.5.1",
     "rimraf": "^2.5.1",
     "style-loader": "^0.13.0",