diff --git a/.gitignore b/.gitignore
index a7a8d08ee..8139708b1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ dist/
 webpack-assets.json
 webpack-stats.json
 npm-debug.log
+package-lock.json
diff --git a/package.json b/package.json
index f3fb6791c..c64d84bbd 100644
--- a/package.json
+++ b/package.json
@@ -168,7 +168,7 @@
     "karma-sourcemap-loader": "^0.3.5",
     "karma-webpack": "^1.7.0",
     "mocha": "^2.3.3",
-    "node-sass": "^3.4.2",
+    "node-sass": "^4.5.3",
     "phantomjs": "^1.9.18",
     "phantomjs-polyfill": "0.0.1",
     "react-a11y": "^0.2.6",