diff --git a/package.json b/package.json
index 34864b51..99f9526e 100644
--- a/package.json
+++ b/package.json
@@ -93,6 +93,7 @@
     "babel-preset-stage-0": "^6.22.0",
     "babel-runtime": "^6.23.0",
     "chromedriver": "^2.30.1",
+    "copy-webpack-plugin": "^4.0.1",
     "css-loader": "0.28.4",
     "deep-extend": "^0.5.0",
     "deepmerge": "^1.3.2",