diff --git a/package.json b/package.json
index a01d249a42..f64f1a3a3c 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
     "react": "15.2.0",
     "react-dom": "15.2.0",
     "redbox-react": "^1.2.3",
-    "sass-loader": "^3.2.0",
+    "sass-loader": "^4.0.1",
     "semver": "^5.0.0",
     "style-loader": "git://github.com/TerriaJS/style-loader#chromeWorkaround",
     "svg-sprite-loader": "0.0.25",