diff --git a/package.json b/package.json
index 337cbae0..733c4c54 100644
--- a/package.json
+++ b/package.json
@@ -81,7 +81,7 @@
     "reflect-metadata": "0.1.2",
     "rimraf": "2.5.2",
     "rxjs": "5.0.0-beta.6",
-    "sass-loader": "3.2.0",
+    "sass-loader": "4.0.1",
     "style-loader": "0.13.1",
     "systemjs-builder": "0.15.19",
     "ts-loader": "0.8.2",