diff --git a/package.json b/package.json
index 5fe2fa24af9d..f74ecb6e536a 100644
--- a/package.json
+++ b/package.json
@@ -65,7 +65,7 @@
     "html-webpack-plugin": "^2.29.0",
     "istanbul-instrumenter-loader": "^2.0.0",
     "karma-source-map-support": "^1.2.0",
-    "less": "^2.7.2",
+    "less": "^3.12.0",
     "less-loader": "^4.0.5",
     "license-webpack-plugin": "^1.0.0",
     "loader-utils": "^1.0.2",
@@ -95,7 +95,7 @@
     "webpack": "~3.5.5",
     "webpack-concat-plugin": "1.4.0",
     "webpack-dev-middleware": "~1.12.0",
-    "webpack-dev-server": "~2.7.1",
+    "webpack-dev-server": "~4.0.0",
     "webpack-merge": "^4.1.0",
     "zone.js": "^0.8.14"
   },