diff --git a/packages/@angular/cli/package.json b/packages/@angular/cli/package.json
index 67a37e40..33de92a3 100644
--- a/packages/@angular/cli/package.json
+++ b/packages/@angular/cli/package.json
@@ -49,7 +49,7 @@
     "glob": "^7.0.3",
     "html-webpack-plugin": "^2.29.0",
     "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",
     "lodash": "^4.11.1",
@@ -76,7 +76,7 @@
     "typescript": ">=2.0.0 <2.6.0",
     "uglifyjs-webpack-plugin": "1.0.0-beta.1",
     "url-loader": "^0.6.2",
-    "webpack": "~3.7.1",
+    "webpack": "~5.0.0",
     "webpack-concat-plugin": "1.4.0",
     "webpack-dev-middleware": "~1.12.0",
     "webpack-dev-server": "~2.7.1",