diff --git a/package.json b/package.json
index 9f5ed97e..63083280 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "ethereumjs-util": "5.1.5",
     "ethereumjs-wallet": "0.6.0",
     "font-awesome": "4.7.0",
-    "hard-source-webpack-plugin": "0.6.1",
+    "hard-source-webpack-plugin": "0.6.4",
     "hdkey": "0.8.0",
     "idna-uts46": "1.1.0",
     "jsonschema": "1.2.2",